Cupid's Undie Run draws participants in their skivvies for a good cause

The Children's Tumor Foundation saw many folks running in their underwear to raise money.

The annual Cupid's Undie Run took place February 10, starting with a party at World Cafe Live in University City.

The event invites participants to strip down to their underwear for a "brief" one mile run in order to raise money for the Children's Tumor Foundation.

People who wanted to run, but not be bare, were allowed to run in costumes. And, as the pictures show, people in Philly participated in their own unique style.