By Cristina Arreola | 11/14/2013 - 14:13
Never heard of #ThrowbackThursday? To put it simply, it's an excuse to relive some of your favorite memories...and, of course, share them for all the internet to see!
Everyone from Jessica Alba to Mario Lopez to Naya Rivera have celebrated #tbt with hilarious childhood pictures. Check out the 25 best celebrity throwbacks: