The "selfie" has become part of the pop culture lexicon, and for celebrities mastering the art of social media, posting them is part of building their brands. Which is to say, a selfie is just another form of self promotion. So who's doing it best this week? We've scoured Instagram and Twitter to find the contenders for the best selfie in this week's Celebrity Selfie Showdown. Heidi Klum January Jones Bar Refaeli Kelly Brook Miley Cyrus Coco Rocha Snooki Hailey Baldwin Julianne Hough Rosie Huntington-Whiteley Madonna Kaley Cuoco Shay Mitchell ParisHilton