Demi Lovato has been tapped to perform the national anthem ahead of Saturday’s highly-anticipated boxing match between Floyd Mayweather and Conor McGregor. Lovato, 25, is one of several A-listers flocking to Las Vegas for the fight of the year, joining Angelina Jolie, Drake, Denzel Washington, Charlize Theron, Adam Levine, Elon Musk, Mark Wahlberg and Patriots owner Bob Kraft, among many others. The pop star is actually a longtime fan of MMA — and its competitors. Lovato dated MMA star Guilherme “Bomba” Vasconcelos before a breakup back in May, and weeks later she was linked to another fighter, Donald “Cowboy” Cerrone. She had enjoyed a fall fling last year with fighter Luke Rockhold. Mayweather and McGregor will face off at the T-Mobile Arena