Britney Spears Admits 'I Have Not Been This Sore In My Entire Life'

The 'Work Bitch' singer opens up to Vegas Player about her days as a teen pop queen and preparing her Sin City routine.

Britney Spears is only weeks away from dropping her eighth studio album, Britney Jean. And while December 3 is nearing, so is her Las Vegas residency and the 15th anniversary of her debut single, "...Baby One More Time."

In a new interview with Vegas Player, a magazine associated with the Caesars Entertainment group, the femme fatale reflects on her meteoric rise to fame as she readies her latest chapter.

"It was kind of like a dream," the former Mouseketeer said. "I'm from a small town and I wasn't expecting anything. When it happened, it was kind of surreal. I got so busy traveling that I was oblivious to it all. I didn't even realize what was happening. It was like a dream that I never woke up from. It was pretty spectacular."

But now, with 2014 on the horizon, Spears will start her two-year residency at Planet Hollywood in Sin City. Starting on December 27, she'll launch into "Britney: Piece Of Me," and though she's had a lifetime to prepare, she admits all the training is taking its toll.

"I have not been this sore in my entire life," she said. "When I started working out, I was sore for, like, three days. I could hardly move. I'm really challenging myself with the choreography."

She added, "Whenever I do a show, I'm really keen on making it a show. I love to dance and perform. Because it's Vegas, I want to do something different. This is the perfect place to bring it to the next level."

Along with prepping her own album, Spears guided Miley Cyrus when they teamed up for Bangerz track "SMS." And when it comes to doling out advice to young pop stars, she notes that close relationships are key.

"It's important to have a group of people around you who can keep you down to earth. It's a mind-altering experience when you become a pop star at such a young age," she said, noting she doesn't pay much attention to "silly" tabloid reports. "Some people are made for it and some people aren't. If you keep good friends around you and stay grounded, you'll be OK."

Spears also admits to being "really shy" despite her career as a pop star. She said, "I don't like the attention, but it's something that comes with success. I've accepted the paparazzi are going to be there; I just try to wear the same thing every day so I become uninteresting."