Spoiler alert: Lots and lots of guyliner and flat-ironed hair ahead!
AFI's Davey Havok then:
Was best known as the vegan and straightedge lead singer of AFI — who also looked like he worked at a MAC store.
Jason Merritt / FilmMagic
Davey Havok now:
Still part of AFI, but recently formed a supergroup with the band members of No Doubt (who no doubt were sick of waiting for Gwen to come back to them).
Matt Winkelmeyer / Getty Images
The Killers' Brandon Flowers then:
Donned a mustache as part of the promotion for the Killers' second album, Sam's Town.
Jason Kempin / FilmMagic
Brandon Flowers now:
Is now stacheless and hopefully back together with the Killers and getting ready to release a new album. PLEASE, BRANDON.
Jason Kempin / FilmMagic