Janet Jackson Shows Off Post-Baby Body in New Tour Rehearsal Pic

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Janet Jackson is ready to get back on the road.

The 51-year-old performer is gearing up for her upcoming tour that will kick off in September, just nine months after welcoming her first child, Eissa Al Mana. On Tuesday morning, Jackson shared a photo of herself going over the choreography for the tour and while she's dressed in a loose-fitted, all-black outfit, it's clear that's she's whipped herself back into shape since giving birth to her son in January.

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"Hey you guys. I’m so excited for the State of the World tour. We are in rehearsal mode. See you guys in one month!" she captioned the photo.

In July, a source told ET that Jackson had moved back to Los Angeles with her son to reside closer to "her mother and family," and was working on the finishing touches of her tour. The source also noted that the new mom had lost over 65 pounds and was focused on a rigorous exercise routine and eating clean. "She will hit the stage with the passion and fire that her fans have come to expect from her when her tour starts on Sept. 7," the source said.

Jackson's upcoming tour comes over a year after she postponed her Unbreakable tour indefinitely, noting last April that she and husband Wissam Al Mana were planning to start a family. A month later, Jackson announced she was pregnant.

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The "Again" singer has since split from Al Mana, and plans to take their son on tour with her. "Touring with baby Eissa could be a possible problem but she's hoping it's not," a source told ET, adding that Jackson's brother, Randy, will also be on the road with her to help take care of his nephew. "[Randy is] her primary source of emotional support and may be the perfect guardian for her son while she's on tour."

Here are more exclusive details on Jackson's highly anticipated return to the stage:

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