Can you guess which celeb is older, M Girls? We're putting your celeb knowledge to the test by challenging you to guess which star was born first. Who's older — Wesley Stromberg or Justin Bieber? Is Harry Styles younger or older than Raini Rodriguez from Austin & Ally? Let's see how many you can get right!
Play the guessing game by clicking through the gallery. Tell us your score in the comments!
Raini Rodriguez plays a teenager on Disney Channel's Austin & Ally and Harry Styles is a crucial member of the boy band One Direction. Who's older? Click "next" to find out!