Z100's Jingleball presented by Aeropostale at Madison Square GardenGroup called...

Z100's Jingleball presented by Aeropostale at Madison Square GardenGroup called "FUN" hams it up on the red carpet. (December 7, 2012). Credit: John Roca

Happy new year! Last week, we counted down the year's best albums. This week, we look at the Top 25 singles of 2012.

1. fun. featuring Janelle Monae, “We Are Young” (Fueled by Ramen): Unconventional, both in form and substance, and yet so catchy that it doesn't matter. In a world too defined by differences, “We Are Young” focuses on similarities, aspirations and possibilities.

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