By Marisa Laudadio
9:11am PDT, Mar 26, 2017
Elton John celebrated his 70th birthday in style on March 25, 2017, surrounded by a slew of celebrity friends. The iconic singer threw a birthday bash at RED Studios Hollywood in Los Angeles, which benefited the Elton John AIDS Foundation and the UCLA Hammer Museum. Now keep reading to see the stars who turned out for the Rocket Man's party, which featured performances by Lady Gaga and Stevie Wonder and feted not only his b-day but marked his 50-year songwriting partnership with lyricist Bernie Taupin.
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James Corden and wife Julia Carey arrive at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
Jon Hamm and old "30 Rock" co-star Jack McBrayer arrive at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
John Owen Lowe, Rob Lowe and Sheryl Berkoff arrive at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
Sharon Osbourne and daughter Kelly Osbourne celebrate Elton John's 70th birthday and 50-year songwriting partnership with Bernie Taupin, benefiting the Elton John AIDS Foundation and the UCLA Hammer Museum, at RED Studios Hollywood in Los Angeles on March 25, 2017.
Ryan Phillippe celebrates Elton John's 70th birthday and 50-year songwriting partnership with Bernie Taupin, benefiting the Elton John AIDS Foundation and the UCLA Hammer Museum, at RED Studios Hollywood in Los Angeles on March 25, 2017.
Robert Herjavec and wife Kym Johnson celebrate Elton John's 70th birthday and 50-year songwriting partnership with Bernie Taupin, benefiting the Elton John AIDS Foundation and the UCLA Hammer Museum, at RED Studios Hollywood in Los Angeles on March 25, 2017.
Stevie Wonder celebrates Elton John's 70th birthday and 50-year songwriting partnership with Bernie Taupin, benefiting the Elton John AIDS Foundation and the UCLA Hammer Museum, at RED Studios Hollywood in Los Angeles on March 25, 2017.
Bernie Taupin and Elton John celebrate Elton's 70th birthday and their 50-year songwriting partnership, benefiting the Elton John AIDS Foundation and the UCLA Hammer Museum, at RED Studios Hollywood in Los Angeles on March 25, 2017.
Billie Jean King and partner Ilana Kloss arrive at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
Matthew Morrison celebrates Elton John's 70th birthday and 50-year songwriting partnership with Bernie Taupin, benefiting the Elton John AIDS Foundation and the UCLA Hammer Museum, at RED Studios Hollywood in Los Angeles on March 25, 2017.
Richard Buckley and husband Tom Ford arrive at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
Jon Hamm arrives at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
Jack McBrayer arrives at Elton John's 70th birthday party at RED Studios Hollywood in Los Angeles on March 25, 2017.
