Don't rule out a Justin Bieber vs. Tom Cruise fight in the UFC ... so says Dana White who tells TMZ Sports there's a very REAL chance the two could actually throw down in the octagon. SUBSCRIBE -- http://po.st/TMZSportsSubscribe About TMZ Sports: Some of the best stories in sports have been off the field and we’re reporting on athletes from NFL, NBA, UFC, WWE, MLB and more! Subscribe to TMZ Sports on YouTube for the latest news, exclusive interviews, clips from TMZ Sports on FS1 and videos of your favorite athletes and celebs. Need More TMZ? TMZ Sports Website: http://po.st/TMZSportsWebsite...
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