Elton John celebrates 70th birthday with star-studded party The guest list included Stevie Wonder, Katy Perry and Lady Gaga.

 -- Elton John knows how to throw a party, and he didn't disappoint when he turned 70 on Saturday night.

The English singer gathered his friends, family and many A-listers to fete him inside Red Studios in Los Angeles. The evening was hosted by Rob Lowe and featured performances by Stevie Wonder, Lady Gaga, Ryan Adams and more.

At one point during the party, Wonder performed his iconic rendition of "Happy Birthday" with help from Lady Gaga.

Other celebrities attended the gala, which also served as a benefit for the Elton John AIDS Foundation and the Hammer Museum at UCLA.

Neil Patrick Harris, Jon Hamm, Heidi Klum, Dakota Johnson, Jennifer Tilly and Katy Perry were all spotted at the party.

John also took to the piano to perform at the party.

Before his big night, the singer posted on Instagram to thank his "Facebook friends for the fabulous birthday card signed by all of you!"