December 14, 2015 4:26 pm If You Call These Students, They'll Sing Carols for You Volunteers at the University of Illinois worked at the 52nd annual Dial-A-Carol, singing holiday songs to people who called in from around the world. US & World Videos 2:08 Jennifer Lopez stuns at first red carpet after Ben Affleck split 0:58 Rare 1787 copy of US Constitution is up for auction and it could be worth millions 3:57 Jessica Simpson, Hoda Kotb and more celebrities share their kids' back-to-school pics 0:52 What is the Guardian Cap on football helmets? 1:15 Quavo, Jacquees and more react to news rapper Rich Homie Quan is dead at 34