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PHOENIX, AZ - FEBRUARY 13: (Exclusive Coverage) P!nk performs during "The Truth About Love" tour opener at US Airways Center on February 13, 2013 in Phoenix, Arizona. (Photo by Kevin Mazur/WireImage)

Sexy Celebrity Abs

January 10, 2013

Go on a celebrity ab-venture with stars from Justin Bieber to Julianne Hough.

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