Beyonce's COUSIN Kristin Is DOING THE MOST On Social Media . . . She Just Posted Video . . . Of Her Getting 'LASER BOOTY SURGERY' On The 'Gram!!!

Beyonce's cousin Kristin became WORLD FAMOUS last year when she UPSTAGED BEY while at a family funeral. Well Kristin is becoming MORE ACTIVE on social media lately. She even posted a video of her getting a "butt treatment."