Is This the Sexiest Super Bowl Commercial Ever?

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ET is behind the scenes of what some are calling the sexiest Super Bowl commercial ever.

"You don't know if I'm naked or not, so it definitely grabs attention," model Charlotte McKinney told ET.

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The Super Bowl is a little more than a week away, but a racy Carl's Jr. ad featuring the 22-year-old model is already making headlines.

Some women's groups are upset, saying that the ad objectifies women, but this is just the latest in a series of Carl's Jr. ads to feature a beautiful celebrity in questionable poses. Former celebrities have included Heidi Klum, Kate Upton, Paris Hilton and Kim Kardashian.

"Carl's Jr. pulled off a great marketing stunt," Ronn Torossian, CEO of public relations agency 5W PR, told ET. "This is a brilliant strategy simply because in today's digital era people are tweeting and retweeting this ad and it allows it to be seen that many more times before you're actually even seeing it in the Super Bowl."

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While viewers may not have been familiar with Charlotte before, now she's being touted as the next Kate Upton.

Charlotte told Esquirethat she dropped out of school at 17 partly because of bullying from other girls, but she's comfortable in her own skin.

"I'm a curvier bombshell with big boobs," she told the magazine. "I'm not high-fashion. I don't do runway. You won't see me at Fashion Week."

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Tune in to CBS on Monday, Jan. 26 at 8 p.m. ET/PT for the Super Bowl's Greatest Commercials 2015. You can vote for your favorite commercial here.

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