Ch-ch-ch-ch-changes.

David Bowie sang it, and now Taylor Swift is doing it.

The former country star announced she's joined the pop music world with the release of her new single "Shake It Off" and upcoming album 1989.

The typically modest singer also showed off her sexier side on the cover of Rolling Stone magazine. The 24-year-old stuck a sultry pose in a wet white tank-top on the beach.

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Swift also revealed her new song, "Bad Blood," is about a "straight-up enemy" in the industry. Right after which pop singer Katy Perry tweeted out a cryptic message starting rumors Swift's song is about her.

Another way Swift is reinventing herself? No more songs about ex-boyfriends.

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"And I'm just not comfortable providing that kind of entertainment anymore," she told the mag. "I don't like seeing slide shows of guys I've apparently dated. I don't like giving comedians the opportunity to make jokes about me at awards shows. I don't like it when headlines read 'Careful, Bro, She'll Write a Song About You,' because it trivializes my work. And most of all, I don't like how all these factors add up to build the pressure so high in a new relationship that it gets snuffed out before it even has a chance to start. And so, I just don't date."

But don't feel bad for the single Swift. She's enjoying her new home in New York City and waiting the release of 1989 on Oct. 27.

"I really like my life right now," she said. "I've started to really take pride in being strong. I love the album I made. I love that I moved to New York. So in terms of being happy, I've never been closer to that."

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