From strawberry-blonde Blake Lively to the newly scarlet Scarlett Johansson, celebrities are quickly converting to the hot hair color of the moment: red! Crimson is even one of the top Wella trends for 2011. "If you look at Christina Hendricks from Mad Men, that's the type of red people are drawn to these days—it's all in this orange and ruby family," says hair colorist Rona O'Connor of the Lukaro salon in Beverly Hills, who gave Blake Lively a bright, golden orange makeover last month. From the Met Ball photos last night, it looks like Blake's ginger red has faded to a more strawberry-blonde hue, but Scarlett Johansson is sporting a red that's more in the rich ruby end of the spectrum. Beauties, what do you think of the redhead trend? Will you try it this summer?