If you've played Who's Older: Couples Edition, you're going to love what we came up with for this week. We researched bands like One Direction, Little Mix, IM5, and more to find out which band members are the oldest. Then we pitted them against each other. It's up to you to rack your brain and dig deep in your mental folder of celeb knowledge to guess which star is older than the other!
Click through the gallery below to play the guessing game. How many did you guess correctly? Are you a wiz or dud at celeb knowledge? Tell us your score in the comments below!