Has Jessica Simpson found love again?

The 29-year-old ex of Tony Romo, John Mayer and Nick Lachey recently played coy with Us when asked ("I have some situations I am feeling out," she said).

Yet last weekend in D.C. an eyewitness spotted Simpson out and about with a hot, Oscar-nominated actor -- one she's been seeing on the sly for months, sources tell Us.

This week's Hot Stuff video -- with Senior Editor Ian Drew and special guest Lil' Jon -- reveals how Simpson and her mystery man have kept things quiet.

Also in the roundup: Glee's Matthew Morrison bashes Britney Spears; Katie Holmes' super-sexy dance for hubby Tom Cruise, and the secret love child of two hot TV stars!