It must be Lady Gaga. I had heard of Lady Gaga even before she was in a Simpson's episode. This is the first time I've ever heard of David Guetta.
David
lady gaga
David Cameron of course.
David Bowie by far
BeyonceHanging on the telephone- Blondie.
Lady GaGa
Lady GaGa
lady gaga
lady gaga
Lady Gaga
Lady Gaga.
Lady gaga