A group of dancers got the surprise of their lives when Janet Jackson walked on stage during their set. The rambunctious unit and Jackson were there to help celebrate the 100th episode of his ...

The event was a surprise to Jackson. Jermaine Dupri, Usher, Jimmy Jam, Nelly, and Bryan-Michael Cox were all in attendance while Anderson .Paak DJ’d the birthday blast.

Jackson is giving fans an intimate, honest look into her life and untold story. The doc, simply titled Janet Jackson, after her 1982 debut album, has been in the making for five years.