When the girl group took the stage to perform its latest hit "Angel" at the awards show, a shadowy fifth figure appeared and then jumped off the set and fell onto the ground, reported Us weekly.
The group then went on to perform "Down" alongside Gucci Mane and also took home the best pop award.
Cabello announced in December 2016 that she decided to exit the group, which now consists of Ally Brooke, Normani Kordei, Dinah Jane and Lauren Jauregui.
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