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

[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/11/08/art.paul.vandyk..jpg caption="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.