1.In honor of Cosmopolitan's 50th anniversary, Cindy Crawford posted this photo of her on cover in 1991.
2.While Michelle Trachtenberg shared this photo of herself in honor of her 30th birthday.
3.Alicia Keys shared her high school yearbook photo of as part of #62MillionGirls.
4.Nico Tortorella (left) shared this photo of himself as a teen.
5.Amy Schumer posted this too cute photo of herself during bath time with her sister.
6.Lenny Kravitz shared this outtake from the photo shoot for the cover of his 1993 album, Are You Gonna Go My Way.
7.Danica McKellar posted this pic of her and her fellow The Wonder Years cast members dressed up like Star Trek characters for the "Just Between You and Me...and Kirk and Paul and Carla and Becky" episode of the series.
8.Lea Thompson shared this promotional photo of her and Tom Cruise from their 1983 movie, All the Right Moves.
9.And finally, UnReal star, Constance Zimmer, remembered where her career first began... as the daughter in those creepy Putterman Duracell Batteries commercials from the '90s.