Which celeb do you think has the 'do of the week?

• Rihanna sports a natural look of loose, full, and ever-so slightly ombre curls. A lot of hair - and no bra!

  

• "Shameless" star Emmy Rossum show class and gloss, with her smooth, but not-too neat blowout.

  

• Kate Beckinsale's beauty isn't confined to her lovely bone structure. Her perfectly piecey tendrils tumble down with sensuality.

  

• With sunny blonde highlights, Kate Moss shows off a Spring '12 runway trend: the wet look. Fortunately, she does it with subtle ease.

  

• Model Bar Refaeli has the "just rose from between the sheets" look nailed. Loose and undone hair compliments her fit-and-flare frock.