The Super Bowl is underway, with the Kansas City Chiefs and the Philadelphia Eagles going head-to-head in New Orleans.Video above: Timelapse shows crowds filling up Caesars Superdome for Super BowlHere’s some of the biggest moments so far:Kendrick Lamar’s halftime performanceKendrick Lamar has begun his eagerly awaited Super Bowl halftime show performance.The spotlight was already on Lamar as the game approached, coming one week after the artist won five Grammy Awards, including song and record of the year for his hit, “Not Like Us.”That song was a major part of a viral-rap battle that occurred last spring between Lamar and fellow rap artist Drake.Lamar sat for a rare interview during the Apple Music Super Bowl press conference on Thursday, where he was asked what people could expect in his set.”Storytelling,” Lamar said. “I’ve always been very open about storytelling through all my catalogue and my history of music. And I’ve always had a passion about bringing that on whatever stage I’m on.”It was announced in January that Lamar would be joined by frequent collaborator, singer SZA, for the halftime performance.The two have worked together often, most recently on the singles “Luther” and “Gloria” for Lamar’s recently released surprise album “GNX,” as well as on “30 for 30” for SZA’s sophomore album “Lana.”Lamar also brought out Samuel L. Jackson dressed as Uncle Sam. Jon Batiste performs National AnthemJon Batiste is kicked off Super Bowl LIX with his rendition of the National Anthem.The Oscar- and Grammy-winning singer, musician and composer – who doubles as leader of the house band for “The Late Show with Stephen Colbert” – belted out the anthem at the Caesars Superdome in New Orleans, Louisiana, where the the Philadelphia Eagles again take on the Kansas City Chiefs for a shot at victory.Dunkin’ snags first ad spotDunkin’ snagged the first ad spot of the game – with the Massachusetts-based chain again enlisting Ben Affleck to represent “The DunKings.””The DunKings” were introduced at the Super Bowl ad last year, with Affleck and stars like Tom Brady and Matt Damon showing off their Boston (and Dunkin’) pride through a boy-band-like performance. But it appears the team has changed some since.In Dunkin’s ad this year, Affleck’s brother Casey, Bill Belichick and Jeremy Strong are new members of the group.Taylor Swift makes her Super Bowl return to watch Travis KelceTaylor Swift was back at the Super Bowl to watch boyfriend Travis Kelce and his Kansas City Chiefs try to complete a historic championship three-peat against her home state Philadelphia Eagles on Sunday.The pop superstar, wearing a simple white ensemble, was spotted about 90 minutes before kickoff in her suite at the Superdome, where she played three sold-out shows during her record-setting Eras Tour last October.Swift and Kelce have been a sports-and-entertainment power couple since early last season, when the four-time All-Pro tight end invited the 14-time Grammy Award-winner to watch him play in a matchup with the Bears.Lady Gaga gives powerful performance on Bourbon Street to honor New Orleans terror attack victimsThe victims of the New Orleans terror attack were honored before the Super Bowl with a powerful performance by Lady Gaga.The performance was recorded on Bourbon Street. Lady Gaga sat at a piano surrounded by New Orleans Police Department officers, New Orleans Saints and Pelicans owner Gayle Benson, NOPD Superintendent Anne Kirkpatrick, legendary Louisiana quarterback Terry Bradshaw, NFL Commissioner Roger Goodell, and NFL greats Howie Long, Jim Johnson, Andrew Whitworth, Demario Davis, Tom Brady, Michael Strahan and Sean Payton.CNN and the Associated Press contributed to this report.