Janet Jackson and boyfriend Jermaine Dupri celebrated her 42nd birthday on Friday by having dinner at Katsuya restaurant in Hollywood:



PHOTO'S: WENN // SPLASH
Janet looked really youthful and even in her early 40's she's the business. The singer-actress has practically grown up in the spotlight and 42, she still stays doing her thang. Kudos to her. You can check out a video of the birthday celebrations after the cut.



































































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