Did you know ... Patrick Mahomes' girlfriend is more of a gym rat than he is?!
It's true -- Brittany Matthews is a budding social media fitness star -- and she showed off the fruits of her labor during an awesome girls trip to Hawaii.
Brit -- along with a bunch of her girlfriends -- flew to Hawaii for a tropical bachelorette party (sans the Chiefs QB) ... where they partied and hit the beach in tiny bikinis.
In fact, all of the girls on the trip had custom swimsuits with their nicknames on them -- Brittany's read, "Fit Brit.