The stars were out in full-force Saturday night at music mogul Clive Davis' annual pre-Grammy Gala & Salute to Industry Icons. This year's event honored Davis' fellow music mogul David Geffen and was held at the Beverly Hilton in Beverly Hills, CA.

Several guests even performed during the party - Jennifer Hudson and Barry Manilow performed a duet together; and R. Kelly played a short set. And Mary J. Blige, Leona Lewis, Cee Lo Green and Rod Stewart also joined the festivities and sang some of their hits.

But Whitney Houston's performance was the big highlight of the evening as she took the stage to belt out a couple of tunes before calling her famous cousin, Dionne Warwick, to join her on stage for a performance of Dionne's classic hit, "That's What Friends Are For," to end the night.

The 2011 Grammy Awards will air on Feb. 13 at 8pm on CBS.