Matthew McConaughey had plenty of reasons to celebrate over the weekend.

His good friend and rumored boy toy, Lance Armstrong, completed the New York City Marathon in under three hours. The actor also turned 37.

So there was every reason to party hard - but we're a little frightened. Why did the sexy Texan keep his shirt on? As you can tell by every other Matthew McConaughey picture out there, it doesn't take much for the We Are Marshall star to bare half of it all.

Was it cold at the celebration? Has McConaughey put on a few pounds and grown self-conscious? We hope you don't go Kate Bosworth on us, Matthew.

You're beautiful just the way you are.