Here we go again?

Last week, Jake Gyllenhaal stepped out in Manhattan with another pretty young thing: Carey Mulligan. After catching his sister Maggie's play Feb. 3, the actor, 30, and the British starlet, 25, supped together the next evening at Italian eatery Lupa.

PHOTOS: Couples who've kept their romance under wraps

Their encore? The cute duo turned up the next night at a late-night concert in Nashville -- where Gyllenhaal's ex Taylor Swift lives!

So what's going on between the pair? Watch this week's Hot Stuff video, as explained by Senior Editor Ian Drew and reality star Danielle Staub.

Also in the roundup: Prince William and Kate Middleton's honeymoon plans, Kim Kardashian's sorta-unimaginative birthday bash for her beau Kris Humphries, and more!

Check out the clip now!