It's Thursday again, which means those of us who use social media celebrate #ThrowbackThursday, the weekly ritual of flipping through dozens of photos featuring our friends, co-workers and acquaintances posting photos from years past.

But celebrities have past lives, too! This week, we take a look at photos posted by Lea Michele, Channing Tatum, Beyonce, Charlie XCX, Melissa Joan Hart and more.

Lea Michele shows us what she looked like as a little girl dressed for Les Mis!

Channing Tatum is out promoting '22 Jump Street' & he shows us his first photo with Kelly and Michael.

Kerry Washington reminisced about the 2013 Emmys.

Olly Murs shows us that he was always a lifelong football fan!


Kat Dennings goofs off with friends in Canada.


Ludacris shared an old photo of him in a red track suit.


Beyonce showed us a photo of her striking a pose.


Ashley Tisdale posted an adorable photo with 'High School Musical' co-stars Vanessa Hudgens and Zac Efron.


Singer Charlie XCX poses with a pastel color filter.


Victoria Secret model Candice Swanepoel posted a photo of a past magazine shoot.


Melissa Joan Hart shares a hilarious photo from the set of 'Melissa Explains It All'