Machine Gun Kelly performed at the Billboard Music Awards on Sunday (May 15) night, where he performed "Twin Flame." 

Before singing the song, MGK told the crowd, "I wrote this song for my wife." Then, midway through the song, he sparked rumors of Megan Fox being pregnant, stating, "This is for our unborn child." A heartbeat could be heard playing during the song, and MGK sang, "Go to sleep, I'll see you in my dreams. This changes everything. Now I have to set you free."

A camera panned over to Megan Fox during the performance, and she was seen crying as MGK performed the very personal song. Following the performance, MGK was asked about Megan possibly being pregnant, given the heartbeat sound, and he told a media outlet, "I was actually wondering if anyone would pick up on, so I'm going to plead the Fifth on that one and just let you guys have that to guess what it is. But yeah, it's … that's a rough one to talk about."