EXCLUSIVE

Yo, yo yo yo ... pop a 40 and check your rollies -- 'cause former WWE tag team Crime Time got up close and personal in Vegas with Khloe Kardashian for her 30th birthday.

JTG and Shad Gaspard were in Sin City for UFC 175 and hit up Tao after the weigh-ins ... where K.K. happened to be partying with French Montana and Miguel.

There was also an Elvis impersonator and a giant 4th of July themed cake.