Happy Throwback Thursday! Are you ready for our weekly TBT guessing game? This week's level of difficulty is an 8 out of 10, so get ready, M Girls. Do you think you know your celebs well enough to tell a baby pic of Justin Bieber apart from Drew Chadwick from Emblem3? Or Victoria Justice from Kira Kosarin? We found childhood pics of these celebs and more, so test out your star knowledge by clicking through our throwback gallery below.
How many guesses did you get right? Tell us your number in the comments!