Selena Gomez is changing her image for her new music video -- and channeling her inner geek, hippie and sexy pop star!

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In just-released photos from the 18-year-old's shoot for "Love You Like a Love Song," Justin Bieber's girlfriend plays some serious dress-up, changing into at least 5 different outfits -- including a tight, bejeweled corset.

The photos were taken last month, before the singer's hospital scare, which she just told reporters was due to not eating correctly.

"I love everything that's possibly not good for me," says Gomez, adding "I love M&M's, Kit Kat, Snickers, Goobers... I did hang at KFC a lot."

The song will hit iTunes next Tuesday.

Check out all the set shots!

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