Taylor Swift might be calling her next breakup song "My Jake Mistake."

In the aftermath of the 21-year-old's breakup from Jake Gyllenhaal, "Taylor has been really down," an insider tells Us of Swift's private mood post-split. (Publicly, Swift put on a brave face at Wednesday's People's Choice Awards.)

Find out more about how Gyllenhaal, 30, distanced himself from Swift in this week's Hot Stuff video, as explained by Senior Editor Ian Drew and singer Cara Salimando.

Also in the roundup: Alec Baldwin admires himself at the gym, Jessica Simpson makes out with Eric Johnson in Aspen, Brad Pitt and Angelina Jolie go bargain hunting, and much more!