Britney Spears Reveals New Twists For Circus Tour

Britney Spears is currently finishing up the European leg of her Circus tour, with the last date taking place in Poland on Friday. But the tour's second round of North American dates will kick off on August 20 in Hamilton, Ontario, and Britney will have new opening acts, new looks and new sounds.

"We have a song called 'Mannequin' that we're adding to the show, which I'm really, really excited about, so it should be interesting," she told "Entertainment Tonight." "We have to update [the show] or it gets really boring."

Britney added that she's also spicing up some of her old numbers for the tour, which hits the States on August 24 at New York's Madison Square Garden and finishes in Las Vegas on September 27 before making its way to Australia in November.

"We've changed up a couple of numbers in the show," she said. "So that's going to make it a lot more fun for me and the dancers. It'll be cool."

Britney is not only hard at work on tour, but she also recently tweeted that she's back in the studio, working with an old friend. "In Stockholm in the studio with Max Martin," she tweeted.

Britney has collaborated with Martin on several of her hits, including "... Baby One More Time," "(You Drive Me) Crazy," "Oops! ... I Did It Again" and "Stronger." After not participating in Britney's In the Zone album, Martin, who has also worked with the Backstreet Boys and 'NSYNC, came back onboard for Circus, co-writing the controversial "If U Seek Amy."

Jessica Simpson and Tony Romo are no more together.

A source close to Simpson confirms they broke up the night before her 29th birthday July 10. She was supposed to celebrate with a Ken and Barbie-themed party. (On Simpson's birthday, Romo spent the night at Los Angeles hot spot My House.)

"She canceled her party because of this," the source tells Us. "She's doing OK."

"Barbie party didn't happen, but I turned 29 and feel like I am on top of the world yelling I LOVE GETTING OLDER!" she wrote on her Twitter page Saturday.

It seems Jessica Simpson got an unwanted birthday present for her 29th Friday – according to People magazine, boyfriend Tony Romo broke up with her the night before.

A source close to the singer, 29, told People that she was “heartbroken” at the news.

“She loves Tony. But it’s been difficult lately. He’s busy with his career and she’s getting ready to shoot her show ‘The Price of Beauty.’ They decided to part ways