MTO EXCLUSIVE PICS: Karrueche Tran Has Been Doing SQUATS AND YOGA . . . And It Looks Like . . . She May Be GROWING A BUTT!! (PICS)

Karrueche used to be shaped like a little boy. But she's been working to change that.

Chris Brown's ex has been working out incessantly - doing squats and other booty building exercises.

And this is the result of all her work. What do you think?

https://scontent-lga3-1.cdninstagram.com/t50.2886-16/22856814_352218525226445_9084421954974253056_n.mp4