Marian Carey is waiting for Jermaine Dupri to invite her into the studio to record a duet with his lover Janet Jackson. Carey is such a huge admirer of the All For You hitmaker, she has given producer Dupri’s collaboration concept the green light. She tells MTV: “I love Janet. I’ve been a big fan of Janet’s since Control. So if Jermaine has a concept, we should go and write something.” ——————————————– Janet Jackson has lost almost all of the weight she has gained since her two years off the scene ? and just in time to promote her new Virgin Records release in the fall. The singer was at her heaviest last October, when she reportedly tipped the scales at about 250 pounds. Paparazzi photos of her shoe shopping on Sunset Blvd. Sunday afternoon show the singer looking fit and trim.