Kim Kardashian (Startraks)

Kim Kardashian hit the New York party scene over the weekend, but again her new husband, Kris Humphries, was nowhere to be seen. On Saturday night, Humphries did a disappearing act as Kim hosted a Midori party at Lavo in Midtown. Dressed as Poison Ivy in a green bustier outfit and red wig, she stuck close to her friend Jonathan Cheban, the ultimate sidekick dressed as Robin. Sources told us Humphries “was supposed to be there but flew home to see his family in Minnesota instead.”

PHOTOS: KIM KARDASHIAN

Yesterday Kim flew to Australia, but her original flight was canceled, so she had to drive late Saturday night after the party to Philadelphia to get a flight out from there. Friday night Kim, still sans hubby, told us she was sad to miss her nephew Mason all dolled up for Halloween. She told us at Vikram Chatwal’s 40th birthday dinner at Romera that she was off Down Under and wouldn’t be able to see little Mason, who is in Los Angeles with his mother, Kourtney Kardashian, in costume. Chatwal gathered 50 of his closest family members, including his wife, Priya, and friends including Andre Harrell, Stacey Bendet Eisner, Nur Khan, Maxwell, Russell Simmons, Nosh Tepperberg and Devon Aoki. Classically trained opera singer Sasha Lazard serenaded the crowd between courses, and the party continued after dinner at the hotel’s underground lounge, Electric Room.