WATCH: Lady Gaga and Stevie Wonder Perform at Elton John's Birthday
posted by Pat McMahon -
Elton John had a star-studded 70th birthday party with celebs like Katy Perry, Neil Patrick Harris and John Hamm in attendance. It wasn't just the celebs attending, musical superstars performed for Sir Elton including Lady Gaga, Stevie Wonder and Ryan Adams singing Rocket Man. Take a look at the performances.