Justin Bieber Only Wears A Pair Of Tighty Whities While Swimming In Iceland!

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Justin Bieber is never one to shy away from showing off his toned bod… and a little vacation in Iceland isn’t about to change that!
That’s because the 21-year-old musician just shared a rather sexy look at his swimming gear on Instagram on Tuesday.
And by swim gear — we mean just his underwear!
Photos: Celebs Stripped Down To Nothing But Their Undies!
JB showed off his tighty whities, which were Calvin Klein, of course, and he just seems all smiles to us.
Plus, we’re really liking the bleach blonde hair on ya, Biebs!
What do U think of Justin’s slightly see-through ensem??
[Image via Justin Bieber/Instagram.]