After a series of canceled concert dates, Janet Jackson finally pulled the plug on her Rock Witchu tour in early November, setting off a flurry of rumors about what could have gone wrong.

Now, an insider close to Janet tells Life & Style the real reason she needed to back out: She and longtime partner Jermaine Dupri, 36, are getting ready for a baby!

For more on Janet and Jermaine's great news, pick up the latest issue of Life & Style, on newsstands now!