by Lauren GarafanoBuzzFeedBuzzFeed Staff 1. This is Reese Witherspoon in 1997 when she was 21: Jim Smeal / Ron Galella Collection via Getty Images 2. This is Christina Aguilera in 2002 when she was 21: Mark Mainz / Getty Images 3. This is Beyoncé in 2002 when she was 21: Jim Smeal / Ron Galella Collection via Getty Images 4. This is Jamie Lee Curtis in 1980 when she was 21: MediaPunch / MediaPunch via Getty Images 5. This is Jason Momoa in 2001 when he was 21: Sebastian Artz / Getty Images 6. This is Drew Barrymore in 1996 when she was 21: Steve.
Granitz / WireImage 7. This is Amanda Seyfried in 2007 when she was 21: Jordin Althaus / Getty Images 8. This is Keanu Reeves in 1986 when he was 21: Fotos International / Getty Images 9. This is Barbra Streisand in 1963 when she was 21: New York Daily News Archive / NY Daily News via Getty Images 10. This is Paris Hilton in 2002 when she was 21: Dave Benett / Getty Images 11. This is Kelly Clarkson in 2003 when she was 21: Albert L. Ortega / WireImage 12. This is Austin Butler in 2013 when he was 21: Anna Webber / FilmMagic 13. This is Ariana Grande in 2014 when she was 21: Jamie McCarthy / Getty Images for MTV 14. This is Usher in 1999 when he was 21: Jim Smeal / Ron Galella Collection via Getty Images 15. This is Nicole Kidman in 1989 when she was 21: Eric Robert / Sygma via Getty Images 16. This is Cher in 1967 when she was 21: Santi Visalli / Getty Images 17. This is Harry Styles in 2015 when he was 21: Karwai Tang / WireImage 18. This is Rihanna in 2009 when she was 21: Pascal Le Segretain / Getty Images 19. This is Sarah Jessica Parker in 1986 when she was 21: Barry King / WireImage 20. This is Courteney Cox in 1985 when she was 21: NBC / NBCU Photo Bank/NBCUniversal via Getty Images 21. This is Selena Gomez in 2013 when she was 21: Rich Polk 22. This is Gwyneth Paltrow in 1993 when she was 21: Ron Galella, Ltd. / Ron Galella Collection via Getty Images 23. This is Tom Cruise in 1983 when he was 21: Ron Galella / Ron Galella Collection via Getty Images 24. This is Nick Cannon in 2001 when he was 21: Steve Granitz / WireImage 25. This is Jake Gyllenhaal in 2001 when he was 21: Donato Sardella / WireImage 26. This is Tyra Banks in 1994 when she was 21: Penske Media / Penske Media via Getty Images 27. This is Taylor Swift in 2010 when she was 21: Michael Buckner / Getty Images 28. This is Jennifer Aniston in 1990 when she was 21: Barry King / WireImage 29. This is Zendaya in 2017 when she was 21: JB Lacroix / WireImage 30. This is Leonardo DiCaprio in 1995 when he was 21: Vinnie Zuffante / Getty Images 31. This is Jennifer Lawrence in 2011 when she was 21: Dimitrios Kambouris / WireImage 32. This is Ryan Gosling in 2001 when he was 21: Randall Michelson / WireImage 33. This is Keke Palmer in 2014 when she was 21: Brad Barket 34. This is Margot Robbie in 2011 when she was 21: Jason LaVeris / FilmMagic 35. This is Britney Spears in 2002 when she was 21: Toni Anne Barson Archive / WireImage 36. This is Megan Fox in 2007 when she was 21: Don Arnold / FilmMagic 37. This is Zac Efron in 2008 when he was 21: Frazer Harrison / Getty Images 38. This is Michael B. Jordan in 2008 when he was 21: Jim Spellman / WireImage 39. And finally, this is Chris Evans in 2003 when he was 21: Jon Kopaloff / FilmMagic Comments