After helping to kick off the CBS Grammys broadcast on Sunday night (Feb. 1) alongside ROSÉ with their smash collab “APT.,” Bruno Mars retook the stage for a second performance — this time on his own, for new single “I Just Might.”

Performing with his backup band the Hooligans in red-and-white ensembles in front of a giant light-up heart, Mars delivered a ripping rendition of the current Billboard Hot 100 No. 1 hit, which had not only his recent collaborators ROSÉ and Lady Gaga boogieing and singing along in the audience, but also fellow stars Sabrina Carpenter, Addison Rae and Sombr. “Brandi Carlile, I saw you shaking it,” said host Trevor Noah after the performance, before joking about Joni Mitchell eyeing the performer.

Mars is one of the most decorated among current pop stars when it comes to the Grammys, having won 16 Grammys in his career, including multiple trophies for both song and record of the year, and an album of the year win in 2018 for 24K Magic. At the 2026 awards, he’s nominated three times with “APT.,” including for record and song of the year. (In the pre-telecast awards, the song lost best pop duo/group performance to Cynthia Erivo & Ariana Grande’s “Defying Gravity.”)

“I Just Might” became Mars’ 10th No. 1 on the Hot 100 in January, as well as his first to debut at No. 1, and spends a second week atop the listing on the most recent chart dated Jan. 31. The song is the lead single from Mars’ upcoming album The Romantic, which is due for release on Feb. 27.