Dolly Parton introduced herself to the country music charts in 1967, at the age of 21, with her debut album "Hello, I'm Dolly."

Dolly Parton is as famous for her image as her many hits.

A successful partnership with Porter Wagoner, the host of the television show of the same name, put her on the national stage.

Forty albums have followed, including a succession of No. 1 hits, awards and high-profile performances on television and film.

She's almost as famous for her image as her vast array of hits. Striking sculptured hair, bright lashings of eye shadow caked on a face that she has admitted in the past owes a lot to modern surgery, and always very high heels.

In 1986, Parton's megastar status was confirmed with the opening of her own theme park "Dollywood." In 2001, a water park, "Dollywood's Splash Country," opened next door.

If you've got any questions for the country singer with four decades of performing behind her - and still going strong - post your comments here and we'll put them to Dolly on Tuesday's show.

German DJ legend Paul van Dyk  joins us to talk about the 20th anniversary of the fall of the Berlin Wall.

Send your questions for Paul Van Dyk.

He is considered to be one of the leading "trance" DJs in the world, with sold-out tours that cross each continent, headline spots at every major festival, and a hugely successful recording career.

The momentous events of that period had a huge impact on the young van Dyk, as he grew up in East Berlin before escaping to West Germany shortly before the fall of the Wall on November 9, 1989.

His love of dance music started when he listened to smuggled mixtapes as a teenager. By the early 1990s van Dyk was spinning regularly at various clubs in Berlin before he released his first album "45 RPM" in 1994. 

His second album "Seven Ways" catapulted him into the Top 100 and brought him to the attention of a wider audience outside Germany.

Aside from his musical activity, van Dyk  has an active interest in politics and social justice.  He has a children’s charity based in the Indian city of Mumbai, and a partnership scheme with the German Red Cross to help poor children in his native Berlin.

He has now penned a musical tribute called "We Are One," which he'll play at the 20th anniversary Festival of Freedom celebrations  at the German capital's Brandenburg Gate on Monday.

Tell us what we should ask Paul and we'll put the best questions to him during the show.

Tom Vanderbilt has literally written the book on a facet of daily life that in one way or another affects just about every human being on the planet: Getting from A to B and the obstacles and frustrations we enounter in between.

Send your traffic questions for Tom Vanderbilt.

From the bicycles of Beijing to the taxis of Toronto, TRAFFIC is unavoidable. Strap yourself in as we discuss his best-selling work "Traffic: Why We Drive the Way We Do (and What it Says About Us)".

Part psychological study, part "how-to" guide, "Traffic" features amazing tid-bits about what happens to us when we get behind the wheel, go for a ride, or simply try to cross the street.

Landmark news events come in two forms. There are the 9/11s which we remember for all the wrong reasons and there are the Berlin Walls which we remember for happier reasons.

Tell us your memories of the fall of the Berlin Wall.

The Wall was the focal point of the Cold War which could have ended in disaster but didn't, instead it ended in a street party. The people who celebrated on November 9th 1989 on the rubble of the Wall still struggle to describe that night.

They knew they were witnesses to history but they couldn't fathom the extent of it. Those who weren't there but were watching it on TV from afar had the benefit of expert commentary and probably got their heads round it more quickly. Where were you? What were you thinking?

And what do you think of Berlin today? It's been transformed into a thoroughly modern capital worthy of its reputation as Europe's capital of cool. But has it lost its way and its identity? Former East Germans speak fondly of a devided Berlin with a simpler way of life and a greater sense of community.

Your thoughts on Berlin then and now are our talking points for this week's webcast. Send us comments.

If ever there was an example of where the international effort in Afganistan isn't working, it came this week.

British soldiers mentor Afghan police. But has the risk become too great?

Five British soldiers were killed by an Afghan policeman they had been training. It came as no surprise that the Taliban claimed to have infiltrated the police and carried out the attack, but it was still a major dent in confidence of British forces who believe they are making a difference.

Kim Howells, a former Foreign Office minister with responsibility for Afghanistan, said the killings strengthened the case for bringing British troops home early.

The current UK government responded by saying forces will only be withdrawn once the Afghans have been given the training and support they need to protect the country themselves.

But, given possible infiltration, should the training continue despite the risk to more foreign soldiers' lives?

When you consider the victims in a war crimes trial, you don't normally consider the defendant first.

How should the war crimes court handle Radovan Karadzic's trial?

But ex-Bosnian Serb leader Radovan Karadzic is trying to play that card in The Hague: he's trying to take control of the proceedings by portraying himself as a victim, denied justice by the West, and sinking under the weight of more than a million pieces of paperwork thrown at him by the prosecution.

I have heard western lawyers suggest that the best thing for everyone is for him to boycott the trial so the prosecution can make its case without further distraction.

But justice should be seen to be done and, vitally, all parties concerned - including Bosnian Muslims and Serbs – need to perceive the trial as fair. How does the court strike the right balance?

Muhammad Yunus received the Nobel Peace Prize in 2006 for his pioneering work in “microcredit” which has helped millions of people out of the poverty cycle.

Send your questions for Muhammad Yunus.

The first businessman ever to receive such a high honor, Yunus has revolutionized conventional ways of banking, creating a system of lending small amounts to entrepreneurs with no collateral.

Recently he has backed the Nobel committee's controversial decision to award the 2009 peace prize to U.S. President Barack Obama.

Yunus set up the Grameen bank in Bangladesh in 1983 (Grameen literally means "of the village" in Bengali), and has since disbursed about $8 billion to Bangladeshi micro-entrepreneurs, 97 percent of whom are women in businesses such as street vending and farming.

The bank's concept is simple. “Credit is a basic human right”, says Yunus. “Offer even a small credit and a person will work out how to best use it to break free of poverty”.

The average loan is just $220, and repayments are near 100 percent. This "microcredit" model has been copied all over the developing world.

In 2009 during a global economic recession Grameen has been little affected according to Yunus. In fact it has now set its sights on helping the poverty-stricken in the U.S.

After the subprime mortgage meltdown and tougher standards by lenders, poor Americans deemed unworthy of credit by commercial banks now have somewhere to turn.

Last year, Grameen opened a branch in New York City's Jackson Heights, an immigrant enclave just miles from the global center of finance, Wall Street.

Yunus says the financial crisis offers an opportunity for businesses, banks and governements to revolutionize, and create a fairer economic system for the world's poor.

Send your questions for the banker with a conscience below, and we’ll do our best to put them to Muhammad Yunus, our Connector of the Day on Wednesday.

Time to think laterally, it's time for the Connect The World Six Degrees challenge. All you need to do is connect two personalities in six moves.

What links Ricki Lake to Hamid Karzai?

This week we want you to link chat show host Ricki Lake to re-elected Afghan President Hamid Karzai.

Leave your submissions in the comments section below, and the team will pick the most creative connection, and I'll announce the winner on Friday's show.

Remember: you need five other people between those two: no more, no less. If you want your friends to take the challenge as well, then click the “share post” button below. To see previous challenges, click here. Happy connecting!

Cooking on TV has exploded on to our screens in the past decade –- and has never been more popular. Whether it’s a Jamie Oliver, Anthony Bourdain, Nigella Lawson, Gordon Ramsey, Wolfgang Puck or Rachael Ray - the career of the celebrity chef has never been more pronounced.

Send your questions for Tom Colicchio.

Back in the day, there was Julia Child and Jacques Pépin.

Now there are literally hundreds of celebrity chefs ladling out their kitchen tips and giving some poor sous-chef a grilling on national TV.

What was the turning point and who caused it? Has the world gone mad over food and the people who make it? And is it changing the way we eat? Are people eating more healthily?

Has there been a move away from fast food, and do more people cook at home? Are we using more responsibly-sourced produce and are we aware of more seasonal choices? During an economic recession do people have more or less reason to splash out on a fancy meal?

Celebrity chef Tom Colicchio is our Connector of the Day on Tuesday. Owner of the Craft family of restaurants in USA and the Gramercy Tavern in NY, he’s an award winning chef and author. He is also the head judge on Bravos’ emmy-nominated reality tv show “Top Chef”.

Send your questions for Tom below –- about food, his career, celebrity chefs, and the future of the restaurant industry.

Hamid Karzai keeps hold of the Presidency of Afganistan after his main opponent, Abdullah Abdullah, pulls out of a run-off vote.

Tell us what you think of Hamid Karzai's re-election as Afghan President.

Abdullah said the vote would not be free and fair. World leaders, including the head of the U.N., helped legitimize Karzai's position by congratulating him.

The American Secretary of State, Hillary Clinton, said Karzai's submission to a second round of voting "bestowed legitimacy from that moment forward, and Dr. Abdullah’s decision does not in any way take away from that."

Saying he is a legitimate leader is one thing, whether the wider public believe it is quite another. We want to know what you, the public, do think so we can refect it in our coverage.

Send us your comments below.