Jason Derulo has been caught up in a massive brawl outside a Hollywood club.

The fight, which broke out early on Sunday morning, was reportedly all caught on tape.

It's understood the Talk Dirty singer was about to leave the nightclub when he joined in, jumping into the melee.

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It was only when police showed up that the situation de-escalated, and Derulo, 27, was then seen in a video obtained by TMZ emerging from the crowd and being taken back to his luxury car by a bodyguard.

The reason for the brawl - or what possessed Derulo to get involved - is not yet clear.

It's not the first time the singer has raised eyebrows.

Earlier this year, he shocked fans by posting a sexually explicit image on Instagram of himself with a naked woman crouched above him.

The controversial snap attracted over 1500 comments in the first hour, with outraged Instagram users describing it as "porn".

"Jesus I'm gonna need 50 gallons of holy water and your powers to get this off my feed," one person posted.

Another posted: "I used to like him until this."