Rewind·Posted on Sep 12, 201915 Celebrity #TBT Photos You Might Not Have Seen This WeekMaluma as little kid kicks off this week's #ThrowbackThursday!by Brian GalindoBuzzFeed StaffLinkFacebookPinterestTwitterMail 1. Maluma posted this adorable photo of himself from the late '90s: View this photo on Instagram 2. Mark Ruffalo posted this photo from the first time he and Robert Downey Jr. ever co-starred together in a movie — 2007's Zodiac: View this photo on Instagram 3. January Jones shared this photo from the "Maidenform" episode of Mad Men — which aired in 2008, during the show's second season: View this photo on Instagram 4. Kourtney Kardashian posted this photo of herself in college in the late '90s: View this photo on Instagram 5. Topher Grace remembered when he visited the Friends set: Topher Grace @TopherGrace #tbt to this coffee shop I found in Greenwich Village. Kind of has a 90s vibe. 04:59 PM - 12 Sep 2019 Reply Retweet Favorite 6. Eva Mendes remembered the first time she ever attended the Toronto International Film Festival in 2005: View this photo on Instagram 7. Christina Aguilera celebrated the 19th anniversary of her Spanish album, Mi Reflejo, by sharing the cover art for it: Christina Aguilera @xtina ¡Feliz cumpleaños! #MiReflejo.....19 years old today!!!! Listen to it LOUD! xxx 05:21 PM - 12 Sep 2019 Reply Retweet Favorite 8. Madonna posted this photo of herself back in the '80s: View this photo on Instagram 9. In celebration of her return to her Vegas show, Gwen Stefani shared this photo of herself performing with No Doubt in the late '90s: View this photo on Instagram 10. Gabriel Iglesias remembered when he met the iconic Joan Rivers back in 2012: G a b r i e l - I g l e s i a s @fluffyguy Happy #TBT to 2012 when I had the pleasure of hanging out with the legendary Joan Rivers. She was so funny and real 😊 12:37 PM - 12 Sep 2019 Reply Retweet Favorite 11. Kathy Griffin shared this photo of herself, George Clooney, and Quentin Tarantino hanging out on the Warner Bros. lot in the '90s: View this photo on Instagram 12. Carly Rae Jepsen (bottom right) posted her third grade class photo (taken in the early '90s): View this photo on Instagram 13. Dolly Parton posted this photo of the time that Miss Piggy guest-starred on her TV show, Dolly, in 1987: View this photo on Instagram 14. Shania Twain shared some photos of her old late-'90s touring costumes: View this photo on Instagram 15. And finally, Will Smith celebrated the 29th anniversary of the premiere of The Fresh Prince of Bel-Air by sharing a clip from the first episode: View this photo on Instagram