Credit: Larry Busacca/Getty

Wish she could be, part of your world....

Blake Lively channeled The Little Mermaid's Ariel on Tuesday in NYC. The naturally blonde Gossip Girl actress, 23, debuted red hair for the Time 100 Most Influential People Gala at Time Warner Center.

"I've had it for about six weeks now," Lively explained on the red carpet.

Why the switch-up?

"I'm in a film called Hick and I'm a redhead for it," she told Us Weekly. Due out in 2012, Lively stars as a character named "Glenda" in Hick -- about a Nebraska gal (Chloe Moretz) who heads out to Las Vegas -- which also features Alec Baldwin, Juliette Lewis and Rory Culkin.

Tell Us: Do you like Lively's fiery new look?