Jennifer Lopez wears Cavalli at her 40th birthday party in New York

For her 40th birthday actress Jennifer Lopez chose two gorgeous dresses by Italian designer Roberto Cavalli.
The one you see in the above pic was donned by JLo at the surprise birthday bash that her husband Marc Anthony threw at the Edison Ballroom in New York.

Among the guests, Liza Minelli, Ricky Martin, Madonna and Beyonce!