Who is 'Valentine's Day's' Best Dressed Star?

Last night was the big, fat, superstar studded premiere of "Valentine's Day," featuring every celebrity that's ever had a fake couple nickname generated about them by a tabloid ... and Shirley Maclaine. Since there are so many dazzling dames in the picture (old timey Hollywood speak!), you know each tried to outshine the next despite all sunny smiles and warm hugs exchanged on the red carpet. So who was the night's fashion victor? Let's rank em!