MTO NEW REPORT: Rob Kardashian Paid For Chyna's 'RIB REMOVAL' Surgery . . . That's Why Her Waist Is SO TEENY TINY!! (PICS)

Remember when Rob Kardashian told people that he paid $100K for Chyna to get her body back after the pregnancy. Well according to a new report, it wasn't just ANY OLD SURGERY that Chyna underwent.

According to an online report, Chyna underwent the controversial "rib removal" surgery.

Looks like it was a success . . .