Justin Bieber is taking part in a one-man wet undies contest
Justin Bieber and Lara Stone for Calvin Klein

Justin Bieber probably has an endless supply of Calvin Klein boxers.

Well, we'd certainly hope so given he's the face (and groin) of the brand alongside model Lara Stone.

And he was rocking a white pair while doing some water sports in Miami Beach, Florida, with pal Ryan Good and his girlfriend Ashley Benson of Pretty Little Liars.

Cue a one-man's wet undies concert.

EXCLUSIVE TO INF. PREMIUM RATES APPLY. UK PAPERS MINIMUM FEE GBP750. EXCLUSIVE TO INF. July 3, 2016: Justin Bieber rides a jetboard in his Calvin Klein underwear during 4th of July weekend in Miami Beach, Florida. Also joining Bieber during his day on the water was his friend Ryan Good and girlfriend Ashley Benson. Mandatory Credit: INFphoto/Fameflynet Ref: infusmi-20/21/usla-23 bbbb
Justin Bieber rides a jetboard in Miami Beach, Florida.(Picture: INFphoto/Fameflynet)

He's winning it. 

EXCLUSIVE TO INF. PREMIUM RATES APPLY. UK PAPERS MINIMUM FEE GBP750. EXCLUSIVE TO INF. July 3, 2016: Justin Bieber rides a jetboard in his Calvin Klein underwear during 4th of July weekend in Miami Beach, Florida. Also joining Bieber during his day on the water was his friend Ryan Good and girlfriend Ashley Benson. Mandatory Credit: INFphoto/Fameflynet Ref: infusmi-20/21/usla-23 bbbb
My Calvins… are soaked. (Picture: INFphoto/Fameflynet)

He knows it too

Not bad boys

A photo posted by Justin Bieber (@justinbieber) on

Needless to say his Beliebers couldn't believe their luck that it was all captured on film.

Such a tease.

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