Jon Gosselin – Before
The father to eight was a a preppy ‘n peppy hubby in 2008.
Before They Were Hunks!
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Jon Gosselin - After
A headline-grabbing bachelor-dude in 2009, Gosselin, 34, now favors flashy gear from Ed Hardy.
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John Mayer - Before
He showed his sensitive side in a black turtleneck in 2002.
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John Mayer - After
Having romanced Jennifer Aniston and Jessica Simpson, the Twitter-happy musician, now 32, is much sleeker and slimmer today.
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Jeremy Piven - Before
In 1995, a decade before Entourage cemented his stardom.
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Jeremy Piven - After
Now a multi-Emmy winner, Piven, now 44, flashes more bravado -- and hair? -- today.
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Justin Timberlake - Before
Love the specs! The former Mouseketeer was an A-list boy band idol (and Britney's boyfriend) in 2000.
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Justin Timberlake - After
To bring sexy back, Jessica Biel's man, now 28, lost the curly fro and added facial hair.
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Kevin Federline - Before
Hit me baby one more time! It wasn't hard to see why Britney Spears chose sexy Federline (in 2006) to father her two kids.
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Kevin Federline - After
From hunk to chunk! After his divorce, the former rapper, 30, seems to have let himself go.
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Brad Pitt - Before
Aw, shucks! Pitt was a squeaky-clean Hollywood hopeful in 1988.
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Brad Pitt - After
Even with questionable facial hair (reportedly for an upcoming film role) Pitt's still got it today, at age 45. Just ask Angelina Jolie!
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Ryan Seacrest - Before
Nice vest! A bright-eyed Seacrest smiles in earlier days.
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Ryan Seacrest - After
At 34, the dapper (and single) TV and radio host is a ubiquitous pop culture figure and a multimillionaire.
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George Clooney - Before
Learnin' the Facts of Life! His luscious locks then shoulder-length, Clooney was a frequent sitcom guest star in 1990.
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George Clooney - After
Some things get better with age. Clooney is now 48.
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Benji Madden - Before
Punk rock, or just pitiful? The pink-topped musician in 2003.
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Benji Madden - After
Now 30, the Good Charlotte guitarist -- and uncle to his twin brother's babies Harlow and Sparrow -- seems mellowed out today.
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Taylor Lautner - Before
The fresh-faced, up and coming tween star smalled pre-Twilight in 2007.
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Taylor Lautner - After
A star is born! Lautner, now 17, hit the gym to beef up for New Moon.
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Bradley Cooper - Before
Blondes have more fun? Cooper with a shaggy 'do in 2001.
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Bradley Cooper - After
With 2009 summer blockbuster The Hangover -- and a romance with Renee Zellwegger -- Cooper, 34, is now a star.
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