The last time Will.i.am shared the stage with Usher during the Super Bowl was when the Black Eyed Peas headlined the halftime show in 2011. But on Sunday (Feb. 11), it was Will’s turn to be the special guest, when he hit the stage at Allegiant Stadium in Las Vegas as Usher’s special guest during the “Yeah!” singer’s electrifying Super Bowl LVIII halftime show to lend a hand on the same song they collaborated on all those years ago, 2010’s “OMG.”

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“How can I explain it? There’s no words to really explain that,” Will told The Hollywood Reporter after Sunday’s game, where defending champs the Kansas City Chiefs bested the San Francisco 49ers in overtime. “Now 13 years later, it means something totally different. It’s beautiful. It was wonderful. It’s fantastic.”

Will also praised Usher for bringing some special flavor to the set via a group roller skating extras who spun and flipped across the stage during a performance that also featured guest spots from Alicia Keys, H.E.R., Jermaine Dupri, Ludacris and Lil Jon. “The reason I say our section was the most ‘What the F?’ is because we’ve never seen roller skating at any type of big world stage like that,” Will said. “It felt like the urban Olympics. He brought the urban Olympics to the Super Bowl.”

Frankly, the face-shield-wearing BEP leader said, Usher’s 13-minute hits blitz had a “lot of OMG moments… so many OMG moments that 60 seconds of ‘OMG’ was all you needed because the show was ‘oh my gosh.’”

Watch Usher’s Apple Music Super Bowl LVIII halftime performance here.