17 Celebrities in Their Underwear ... Because the Days Are Long and the Nights Are Lonely

We would like to thank these 19 celebrities for their service to this great nation

CIARA

"I feel so proud to say that four months after delivering a 9 lbs. 10 oz. baby, I can finally rock my Calvins," the singer captioned her 2014 Instagram post. (A perfect #HumbleBrag if we've ever seen one. Game recognize game.)