Marketers at top brands have been granting celebrities including Justin Timberlake, Beyonce, Marc Jacobs and Victoria Beckham such titles as chief creative officer, head of creative design or chief innovator. The deals are an attempt to go beyond the typical endorsement, and they can backfire if there's a falling out or a history with another brand, but analysts say the practice likely has little downside. "Most is hype. But no doubt some people become celebs because they are truly creative people, so why not experiment?" says Pete Favat, chief creative officer at Arnold.