Kristin Cavallari has returned to Mexico ... she's back on the beach -- only this time, she left her NFL hubby at home.
The former 'Hills' star grabbed a bunch of her girlfriends and jetted over to Tulum ... where they've been soaking in the sun and drinking wine on the sand. Good times.
Funny, considering the last time Kristin was in Mexico she convinced Jay Cutler to go full naked on the beach and posted a bare ass photo of the QB for all the world to see.