AceShowbiz -

Britney Spears admitted that her reality show with ex-husband Kevin Federline was a big stumble in her career. The "Perfume" singer called "Britney and Kevin: Chaotic", that lasted only five episodes, "...the worst thing I've done in my career."

"Chaotic" aired from May 17 to June 14, 2005 on UPN. It took home videos of the in-love couple during her 2004 Onyx Hotel Tour in Europe. Over the course of four weeks, the series lost more than 1.6 million viewers. Critics have also panned it and called it a career suicide for Britney.

In a new interview with U.K.'s The Telegraph, Britney said, "I would never do something like that again. Actually, that was really bad. That was probably the worst thing I've done in my career." And when asked whether she felt the same way about her 2002 movie "Crossroads", she "looks suddenly outraged and clutches her hand to her heart. 'No!' she shouts, springing to life. 'I like Crossroads! F**k you!'," the Telegraph wrote.

Britney and Kevin were married for two years before divorcing in 2006. Prior to dating Kevin, Britney had a high-profiled relationship with Justin Timberlake. The couple famously wore the same matching denim outfit to 2001 American Music Awards. "It was a pretty carefree time," she recalled. "We were just, like, 'We look great, let's go!' I have great memories of that time: there were a lot of rehearsals, but there was also a lot of clubbing and a lot of dancing."