2010 Justin Bieber [updated]

Thirteen-year-old girls everywhere are rushing home to check their walls, their iPod Nanos are loaded with one specific artist, and the "sideswept" haircut—the Bieber Flip —is the mandatory uniform for every middle school boy trying to be cool.

In 2010, the world was simple: you either loved him, or you pretended to hate him while secretly knowing every word to "One Time." 2010 justin bieber

In January, the world changed with three simple syllables: "Oh, whoa, oh." When featuring Ludacris dropped, it didn't just climb the charts—it lived there. The music video, featuring a bowling alley dance-off and a very young Selena Gomez cameo (before the "Jelena" rumors truly exploded), became the most-watched video in the history of the internet at the time. Thirteen-year-old girls everywhere are rushing home to check