Rapid rebound!

Teen Mom 2's Leah Messer reunited with her ex-beau Robbie Kidd just days after finalizing her divorce from Corey Simms in mid-June.

Messer, 19, and her ex-hubby Simms, 20, share custody of their 18-month-old twins, Aliannah and Aleeah. A source tells Us Weekly that Simms isn't fazed by his ex's new love and is "not interested in reconciling."

For more details on the Teen Mom 2 star's rekindled romance, check out this week's Hot Stuff video, as explained by Senior Editor Ian Drew and Basketball Wives star Jennifer Williams

Also in the roundup: Eva Mendes and Jason Sudeikis' rumored romance, Ashlee Simpson's mind games, Prince Harry's encounter with Chace Crawford and much more!