Hollywood's new wavers: Britney Spears, Lindsay Lohan, Keira Knightley

Pack up your flattening wands and dig out your old curling iron.

Waves are officially the latest hair look in Hollywood. At least this week.

At Sunday's MTV Video Music Awards, Britney Spears and Lindsay Lohan both wore long, wavy, Lady Godiva blond hair. And Keira Knightley, star of the upcoming costume drama "The Duchess," arrived at the "Late Show With David Letterman" this week wearing long, loose waves.

Photo: WireImage