Petras and Sam Smith took home the trophy for their hit track, 'Unholy.'
Host Trevor Noah said the singer's late arrival was due to traffic.
Swift congratulated her famous ex on taking home the trophy.
Anitta chats with ET at the 65th GRAMMY Awards in Los Angeles, airing Sunday on CBS.
Styles is nominated for a total of six awards at Sunday night's show.
Dwayne Johnson chats with ET's Nischelle Turner at the 65th GRAMMY Awards, airing on CBS.
The actress ditches her wrist brace for music's biggest night.
The 'Low' rapper attended the 65th Annual GRAMMY Awards Sunday.
The 65th annual GRAMMY Awards marks Trevor Noah's third time as host.
Jack Harlow chats with ET's Kevin Frazier at the 65th GRAMMY Awards, airing on CBS.
Beyoncé surpassed Georg Solti with her 32nd win.
The GRAMMY-winning artist stunned on the red carpet at this year's show.
Ata Johnson was involved in a 3 a.m. crash last week.
The artist and producer made the GRAMMY Awards a family affair on Sunday.
.jpg?width=256&quality=80)
.jpg?width=780&quality=80)
