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Bruno Mars will join Beyoncé on the field for a major moment during the Super Bowl 50 halftime show.

A source tells EW that Mars has been spotted rehearsing at Levi’s Stadium in Santa Clara, California, and in one of his numbers, he’s singing alongside Beyoncé. The pair will unite for a big moment in during Sunday’s halftime show.

Mars and Beyoncé are part of a star-studded lineup for the Super Bowl 50 halftime show, which is being headlined by Coldplay. Lady Gaga is slated to sing the national anthem before the Super Bowl, which will pit the Carolina Panthers against the Denver Broncos.

Mars previously teamed with the Red Hot Chili Peppers to headline the 2014 Super Bowl halftime show; Beyoncé performed with Destiny’s Child in 2013.

Last month, director Hamish Hamilton told EW the halftime show would include a throwback to performances past. “The legacy of 50 Super Bowl halftimes will certainly be featured [during halftime],” Hamilton said. “It may not be a literal thing, but you’re definitely going to get the sense of 50. [And] there are always guests. I don’t see why this show would be different.”

Mars’ involvement in Super Bowl 50 has been discussed for some time — and last year, EW reported the “Uptown Funk” singer would appear during the halftime show. (Head here to get all your burning Super Bowl questions answered.)

Mars confirmed he will participate in the halftime show via his Instagram on Friday afternoon.

The Super Bowl airs Sunday on CBS.