Beyoncé showed her support for Jay-Z when she attended the 10th anniversary party for his 40/40 Club in NYC last night. She wore a white Roberto Cavalli gown as she sipped on Champagne and mingled with guests like T.I., his wife, Tiny, and Kylie Minogue, who put her legs on display in an Anthony Vaccarello minidress. Beyoncé showed her support for another friend, Kanye West, yesterday when she publicly congratulated him and Kim Kardashian on the birth of their first child. She was by Kanye's side last week when she and Jay-Z attended a listening party for Yeezus in NYC last Monday. Kanye had been touring around the country to host listening parties for his new record but had to pull out of his bash last Friday in LA when Kim reportedly told him that she wasn't feeling well and was checking into the hospital.