Legendary singer Diana Ross celebrated her 75th birthday at a star-studded party held at LA's Warwick club on Tuesday, and was treated to a special performance by none other than Beyoncé. The 37-year-old singer was surrounded by attendees as she belted a melodious rendition of "Happy Birthday" to the guest of honor. Diana, who sported a glimmering ensemble, looked on before striking a few poses and giving us raised church hands (y'all know what I'm talking about). At the end of the tune, the two icons gave each other a warm hug as the crowd cheered.
Other guests included Stevie Wonder, Gabrielle Union, Khloé Kardashian, DJ Khaled, and of course, Diana's family. Diana also sang a number of her hits including "I'm Coming Out" and "Ain't No Mountain High Enough," and celebrated the honor of having a whole day dedicated to her as the city of LA officially declared March 26 "Diana Ross Day." Ahead, view more pictures and videos of the jamboree!