Here's a tip to celebrities performing this year: There's a dress code on the biggest night of the year. Look to those who came before you and follow their lead.
2012, Lady Gaga
Sparkly catsuits = always in style.
Image by Jemal Countess / Getty Images
2012, Lady Gaga, again.
Looking like the Statue of Liberty = also always in style.
Image by Jemal Countess / Getty Images
2012, Florence Welch
Flowing robes, naturally, for Florence.
Image by Kevin Winter / Getty Images
2011, Natasha Bedingfield
Grandma-chic.
Image by Natasha Bedingfield / Getty Images
