Last night Alicia Keys hosted another successful Keep a Child Alive Black Ball for the foundation. The philanthropist has been working for 11 years to help support families and children affected by HIV and last night was no different.

The theme was lights out as the celebs took over the Hammerstein ballroom in NYC in their best black outfits all in the name of charity. The very pregnant Keys was joined by her love, Swizz Beatz and a host of other celebrities throughout the night. While we can't say we loved every look, we can say we appreciated that unlike the AmFar charity event, the stars were appropriately clothed for the night of giving back. From long gowns to menswear-inspired trends, the women definitely outdid themselves as the fellas brought sexy back with their fitted tuxes. Vixens, flip the page to check out the stars that stepped out in their best to the Keep a Child Alive black ball.

All Photos: Getty