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Gisele Bundchen and Nicole Richie were spotted leaving Tracy Anderson's gym in Studio City this morning, and the ladies didn't take a class together, but they may have coordinated their outfits! With temps soaring into the low 90s in LA this week, the spandex-clad starlets made sure to get their workouts in before the heat made a cardio sesh unbearable.

So what else has Nicole been up to today? Oh, just hacking Khloe and Kim Kardashian's Twitter pages as an April Fools' Day prank! The mother of two gained access to Khloe's account, tweeting gems like "My poops are in the shape of Ks" and "I DON'T CRAP ... I KRAP!" Of course, Khloe was able to figure it out, but not before Nicole made her way onto Kim's profile and posted raunchy one liners about her boyfriend Kris Humphries. Ahh, how mature...