25 biggest celebrity MMA fans: The Rock, Snoop Dogg, Madonna and more

LAS VEGAS, NV - MAY 23: (L-R) Daniel Cormier, Arnold Schwarzenegger and Chris Weidman pose for a portrait during the UFC 187 event at the MGM Grand Garden Arena on May 23, 2015 in Las Vegas, Nevada. (Photo by Mike Roach/Zuffa LLC/Zuffa LLC via Getty Images)
LAS VEGAS, NV - MAY 23: (L-R) Daniel Cormier, Arnold Schwarzenegger and Chris Weidman pose for a portrait during the UFC 187 event at the MGM Grand Garden Arena on May 23, 2015 in Las Vegas, Nevada. (Photo by Mike Roach/Zuffa LLC/Zuffa LLC via Getty Images) /
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NEW YORK, NY – NOVEMBER 12: Former UFC middleweight champion Luke Rockhold and musician Demi Lavato during attend the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Mike Stobe/Zuffa LLC/Zuffa LLC via Getty Images)
NEW YORK, NY – NOVEMBER 12: Former UFC middleweight champion Luke Rockhold and musician Demi Lavato during attend the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Mike Stobe/Zuffa LLC/Zuffa LLC via Getty Images) /

17. Demi Lovato

Demi Lovato has been seen sitting cage side since she was dating Wilmer Valderrama, which seems like an eternity ago. Once the pair broke up many thought she’d stop attending — but in fact her fandom increased.

Lovato began dating former UFC middleweight champion Luke Rockhold shortly after he won his title. The relationship didn’t last long but they were the hottest UFC couple while it lasted. Lovato even began training in Brazilian Jiu-jitsu and MMA around that time, proving her fandom runs deep.

She achieved her blue belt at Jay Glazer’s Unbreakable Gym in Los Angeles after spending hours on the mat with some of the greats like Chuck Liddell and Randy Couture. She even briefly voiced her desire to take a fight, but that never came to fruition.

“I’m more proud of the work [Demi] puts in with nobody watching than I am what she does with the world watching,” Glazer tweeted in regards to her getting a new rank in BJJ.

Lovto is often spotted cage side at Bellator events as well and even dated Guilherme Vasconcelos, a top Bellator competitor. That relationship ended as well, but she still supports both of MMA’s biggest promotions.

And to top it all off, Lovato sang the National Anthem at the biggest combat sports event in history — Floyd Mayweather vs. Conor McGregor.