Beyoncé Knowles got into the All Hallows' Eve spirit last night in NYC, wearing a bumblebee costume with matching striped stilettos out to Kanye West and model Anja Rubik's Halloween party at the Darby. The pregnant singer has been hanging out close to home in the Big Apple as she preps for her February due date. In fact, Beyoncé and Jay-Z are reportedly planning a 2,200-square-foot nursery for their new arrival! B appeared to have a blast last night at Kanye's soriee, and even though Jay wasn't by her side for the festivities, she was seen dancing from her seat when a song from Watch the Throne came on. The star has been keeping busy supporting her own album, 4, as well. She most recently released the music video for her song "Party," which features a cameo from her little sister Solange Knowles.