Tons of celebrities (and pseudo celebrities) attended the VH1 Divas 2012 concert held at the Shrine Auditorium in Los Angeles, Calif., on Sunday.

Stars paid tribute to legendary late entertainers Whitney Houston and Donna Summer. Jordin Sparks, who co-starred with Houston in her last film, "Sparkle," before her death in February performed a medley of the star's hits with Melanie Fiona and Ledisi - "I'm Every Woman," "I Wanna Dance With Somebody" and "How Will I Know."

Kelly Rowland, Adam Lambert and Keri Hilson honored Summer, who died in May, by performing "I Feel Love," "Bad Girls" and "She Works Hard For The Money."

Miley Cyrus, who arrived in a slinky black cut-out dress, channeled Billy Idol by singing "Rebel Yell" in a spiked leather costume. Ciara did a Michael Jackson mashup with his "Billie Jean" and her new single "Got Me Good."

Demi Lovato belted out "Give Your Heart a Break" while newly engaged Kelly Clarkson performed "Catch My Breath."

Several actresses attended the event, including Elisha Cuthbert, Jenna Dewan and Charlotte Ross. "Hollywood Exes" stars also attended, including Nicole Murphy and Jessica Canseco.

Check out tons of photos from the event...