In this Who Wore It Better, Travis Pastrana and Justin Bieber face off in their Ethika Underwear. Who Wore It Better? Vote for your favorite to let us know!

Start your bidding, folks! A Justin Bieber underwear auction is on now to benefit a charity founded by Hélène Campbell, a special guest on Ellen who received a double lung transplant.

This week in Celebrity Underwear SIghtings, we spotted a photo of James Van Der Beek in boxer briefs. We also caught Justin Bieber and Mark-Paul Gosselaar.

Happy Birthday Justin Bieber! The young prince of pop is turning 19 on the first of March and we baked him a special underwear shaped cake to celebrate!

The Biebes hosted Saturday Night Live and gave us a great Justin Bieber clothes sighting? We hypothesize why Bieber didn’t drop trou on SNL last weekend.

Another Justin Bieber clothes-less sighting has surfaced. The pop star was photographed on Monday at his Miami hide-out wearing only black boxer briefs.

We love Justin Bieber underwear sightings as much as the next briefs-loving guy, but the singer needs to stop trying to moon the camera and his many fans.

It’s here: the top 5 Justin Bieber underwear sightings of all time. We compiled a list of our favorite pics of the star dropping trou for his ecstatic fans.

Underwear lovers found more to love in the pop singer with a new picture of Justin Bieber wearing boxer briefs, which he posted on Twitter this Saturday.

Justin Bieber underwear sighting! The performer tweets a picture of himself in white Calvin Klein Underwear during a rehearsal in Washington D.C.

Fans of the teen star were treated to a generous flash of underwear.

Over the weekend, Justin Bieber performed at 102.7 KIIS FM’s Wango Tango in California and gave Belieber’s another reason to Beliebe: the teenage singer sports clean, white briefs under his saggy pants.