Machine Gun Kelly Dedicates Emotional BBMAs Performance to 'Wife' Megan Fox and Their 'Unborn Child'

Machine Gun Kelly Dedicates Emotional BBMAs Performance to 'Wife' Megan Fox and Their 'Unborn Child'

On Sunday night, Machine Gun Kelly delivered an exceptional performance at the Billboard Music Awards.

After walking the red carpet with fiancée Megan Fox in Las Vegas, the singer, 32, hit the stage and dedicated his song, "Twin Flame," to the actress.

" I wrote this song for my wife," he said onstage, sparking speculation the couple has wed.

Near the end of his emotional performance, MGK (né Colson Baker) took a moment for another dedication, saying: "And this is for our unborn child."

" Go to sleep/ I'll see you in my dreams/ This changes everything/ Now I have to set you free," he sang, as the sound of a heartbeat followed shortly after.

Reps for MGK and Fox have not responded to requests for comment. MGK tweeted about the ballad after the award show, saying it "broke my heart to sing the end of that song."

" i recorded twin flame 2 years ago today, the second half came a year later. beautifully serendipitous getting to sing it for you tonight," he wrote in a second tweet.

Speaking to ET on the red carpet, the star revealed he had played the moving track for Fox, 36 when he first wrote it.

" It's like it's all meant to be," he said. Added Fox, who has often referred to her beau as her twin flame: "There's like super special secret meaning to the song as well. So I'm sure I will be [emotional], but I can't cry and f-- up this eyeliner."

The couple-- who met while filming their movie Midnight in the Switchgrass-- announced their engagement in January. In their first joint interview as a couple, Fox called MGK her "twin flame" and said that they had felt an instant connection on set.

" I knew right away that he was what I call a twin flame," she said on the Give Them Lala ... With Randall podcast. "Instead of a soul mate, a twin flame is actually where a soul has ascended into a high enough level that it can be split into two different bodies at the same time.

So we're actually two halves of the same soul, I think. And I said that to him almost immediately, because I felt it right away."