No one was more surprised to hear details about Emily Maynard's split with Jef Holm than the reigning Bachelorette herself.

In the latest issue of Us Weekly (on stands Friday), a source reveals that single mom Maynard, 26, was shocked to learn that her fiance, 28, was shopping a tell-all about their split to magazines. "Reporters were calling her asking, 'Will you comment on the story?" the source reveals. "She was blindsided."

An insider says Maynard (mom to Ricki, 7) "is sad and embarrassed about Jef."

For more details on what caused Holm and Maynard to split, watch this week's Hot Stuff video, as explained by Us Weekly senior editor Justin Ravitz and Elvis Duran and the Morning Show radio deejay Elvis Duran!

Also in the roundup: Mariah Carey gets an eight-hour, $1,500 massage; Chace Crawford rents out a private room at the Gossip Girl wrap party; Maddox Jolie-Pitt orders an "adult-sized burger" while his siblings "had minis"; and much more!