Justin Bieber wants to fight Tom Cruise

Left: Justin Bieber (Source: MGN / Instagram) Right: Tom Cruise (Source: MGN / Paramount Pictures)
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(CNN) - Justin Bieber wants to fight Tom Cruise... and no one knows why.

The 25-year-old singer tweeted the challenge to the 56-year-old actor on Sunday appearing to jokingly taunt Cruise.

He even tagged Dana White, head of the ultimate fighting championship, asking if he'll host the match.

Former UFC champ Conor McGregor says he's totally for it and offered to host if cruise accepts the challenge.

It's unclear why Bieber wants to take on Cruise.

Neither of their reps have commented yet.


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