Speedo Wearing Santas Raise Money for Kids

The 10th annual Boston Santa Speedo Run took place over the weekend -- when weather got down into the 30s.

What started as a practical joke back in 2000 (five tipsy friends stripped down to their underwear and, in fake beards and Santa hats, ran through the streets singing Muppet Christmas carols) is now an annual event raising money for Crossroads for Kids and Bottom Line, two Massachusetts-based youth charities.

Check out photos from the Boston event here. And watch video from the San Francisco and Boston events below.