Selena Gomez donned her red-hot Puma leggings and tied up her red tee into a crop for hot Pilates today.

Since her stint in treatment for a mental issue, she's been on the exercise tip, going on hikes every day. Good for her! She's been visiting pals, going out to lunch, and in fact it's the second day in a row she's been at hot Pilates -- check out the video below ...


We honestly think her treatment was to cure her of an extreme case of Bieber fever -- no, seriously -- we think she must have suffered the fallout of learning Justin had married Hailey Baldwin. We asked her about Justin yesterday ...



Selena LOOKS great; we just hope she's actually, really, seriously doing well!