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.