Demi Lovato Is Dating UFC's Luke Rockhold

Secret's out ... Demi Lovato is dating UFC superstar Luke Rockhold -- and TMZ Sports has learned it's a romance that's been blooming for a couple months.

Our sources tell us ... the 24-year-old singer hit it off with the 31-year-old former UFC middleweight champ earlier this year while training at Unbreakable gym in Los Angeles.

Long story short ... we're told the two clicked right away -- and have even sent some secret inside messages to each other on social media ... including a back and forth with smiley face art on their fingers.

Congrats!

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See also

Demi Lovato & Joe Jonas -- We Haven't Forgotten Our Disney Roots!!! (VIDEO)

Demi Lovato -- The Single Life Ain't So Bad (VIDEO)

Luke Rockhold Demi Lovato Hook Ups Dating TMZ Sports Couples UFC Gossip / Rumors Exclusive Music

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