The Irish UFC star appeared to throw a punch at the US rapper on the red carpet at Sunday’s bash.
The 2021 VMAs aired live from New York City after last year's mostly virtual ceremony.
Looks were served by Lil Nas X, Billie Eilish, Ed Sheeran and many more on the red carpet.
The Chromatica singer wore her most daring outfit to date on the VMAs red carpet in 2010.
"You would never tell Travis Scott or Adam Levine that he couldn’t turn the beauty light off," the singer said.
She split from husband Liam Hemsworth earlier this month.
Including music videos from Miley Cyrus, Ed Sheeran and Billie Eilish.