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We haven't seen the last of Britney Spears in Las Vegas.

The pop princess just announced during her show at The Axis at Planet Hollywood that she has signed a new deal to extend her residency.

Spears, 33, told me exclusively earlier today how excited she is about continuing Britney: Piece of Me.

"I'm not ready to leave Vegas yet! And I just really really love this show and this city," she said. "I'm so proud of the show, and my band, my dancers and my crew have all become such a family to me. When it came down to me really having to make this decision, I just couldn't imagine ending my residency at the end of this year."

Britney Spears

Denise Truscello/BSLV/Getty Images for Brandcasting, Inc

And even if you've seen the show already, be prepared to book another trip to Sin City because Brit has some new ideas in the works. "I definitely have some major changes planned. I'm getting together with my team this week to go over the set list, design some new costumes and dream up new props," she said. "There are a few songs that are fan favorites that I really want to add to the show. It's very exciting! If you haven't seen the current show yet, you should come out before the end of the year."

Planet Hollywood offered her a new deal at the end of July, but on Aug. 16 Spears told me that she hadn't yet made a final decision.

"I'm not really sure," Spears said at the Teen Choice Awards. "I haven't made up my mind. I really love doing the show. It's a lot, a lot of fun, but I'm kind of torn right now. I don't really know what I want to do."

Fortunately, she decided to stay. If she hadn't, her last shows would have taken place over New Year's weekend.

While rumors started circulating as early as 2011 that she was in talks for a residency, Spears confirmed the news in September 2013 during an appearance on Good Morning America. Piece of Me launched on Dec. 27, 2013.

She celebrated her 100th show last month.

And that's not all the Britney news we've got in store for you! Tune into E! News tomorrow night at 7 p.m. and 11 p.m. to find out what she said about releasing some new music!