Star Trek Into Darkness opens this week, kicking-off summer blockbuster season and sending us on the hunt for more Chris Pine underwear sightings.

This week on the small screen, we caught a Ty Burrell underwear sighting on wheels, a whole line-up of musical stars down to their boxer shorts, and more.

This week Harry Styles tweeted a Niall Horan underwear Vine video of his 1D bandmate dancing around backstage with socks over his hands and skivvies on his head.

This week in Celebrity Underwear Sightings, Zac Efron showed off his skills and his skivvies on the set of Townies (again), while Zachary Quinto posted an Instagram kicking back in his Calvins.

A whole bevy of Tom Daley beach photos surfaced this week, after the British Olympic diver spent a day frolicking with his teammates on the shores of Ft. Lauderdale, Florida.

This week in TV Star Underwear Sightings, stars went wild and left their pants behind, including Chris Messina underwear racing on The Mindy Project and so much more.

It was quite a week for the Paltrow household, as Gwyneth caused quite a stir for her lack of underwear on the Iron Man 3 red carpet, while hubby Chris Martin was spotted working out.

It was a great week for TV Star Underwear Sightings on and off the tube, including a sexy Trevor Donovan underwear spread, Ryan Lochte underwater, and more.

In something of a zany week, paparazzi snapped a Zac Efron underwear sighting on the set of his new movie Townies, while Shaq circled the TNT news studio in his tank and boxers.

As if we weren’t already excited for his reality television debut, this week’s Ryan Lochte underwear sighting brought our anticipation to a fever pitch.

Believe it or not (or should we say ‘beliebe?’), yet more Justin Bieber Instagram photos out last week show the young mega-star in his underwear, plus Ashton Kutcher sags low and more Celebrity Underwear Sightings.

Ian Ziering announced this week he’d be the latest in a hot line up of celebrity Chippendales dancers to hit the male revue stage, so we decided to take a look at some of our past favorites.

We were thrilled with the news of Ian Ziering Chippendales debut, check out Ian in some wet trunks and more of this week’s TV Star Underwear Sightings.

Thanks to the paparazzi and The Underwear Expert’s critical eye, we’ve assembled our Top 5 Celebrity Bulges. Find out if your faves are on the list here.

Did you tune into the MTV Movie Awards last night? If you did, you were probably shocked to witness Zac Efron remain completely clothed.