It was the singer's first time on the AMAs stage in five years.
What's that sound?
Oh, just Bruno Mars bringing the house down at the 2016 American Music Awards on Sunday night! The soulful artist hit the stage to perform his new hit "24K Magic" as an epic way to start the show.
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The explosive performance featured Mars rocking his signature dance moves with a troupe of track-suited backup dancers and plenty of fireworks.
John Legend and Chrissy Teigen were among the star-studded crowd of fans singing along to the energetic performance. Even Lady Gaga couldn't help herself!
The singer released his third studio album, 24K Magic, on Friday and it is already No. 2 on the iTunes chart.
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Mars previously performed at the AMAs in 2011, when he took home an award for Favorite Pop/Rock Male Artist.
For more from Mars, watch the clip below!