Bright red lipstick and gym clothes? Hmm...

On Tuesday afternoon Kourtney Kardashian went to the studio to shoot scenes for Keeping Up With The Kardashians, and the 36-year-old mother of three wore spandex and sneakers on the bottom and a graphic tee and very rocker hair and makeup on top. And you know what? Even though it's an odd combo, she still looked hot!

After splitting from baby daddy Scott Disick earlier this summer, Kourt hasn't been shy about showing off her hot revenge bod -- or keeping Scott away from their kids, apparently! The other day when Scott tried to enter Kourt's gated Calabasas community, he went in through the guest entrance, and TMZ reported that Scott is now only allowed inside the development when he has an invite from Kourt. Hmm, given all the crap he's pulled this summer, we doubt he'll be getting too many of those...