Over the years, Britney Spears has seen plenty of career ups and downs, but there's one career decision she made that she considers to be the absolute rock bottom. 

Speaking to the British paper The Telegraph, Britney reveals that Britney and Kevin: Chaotic, the 2005 five-episode reality show she did with her then-husband, Kevin Federline, was a huge mistake.  "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.”  Critics agreed: Entertainment Weekly described the series as "career suicide by videocam."

When the paper asked if her widely-panned movie debut, Crossroads, was also something she regretted, Britney laughed, "No! I like Crossroads! F**k you!”