Kevin Federline is famous because he married pop star Britney Spears
in 2004. Federline was a back-up dancer for Justin Timberlake
before Spears invited him to join her European tour in 2004, and by October of that year they were married. While the tabloids kept a close watch on his relationship with Britney (and their sons, Sean, born 14 September 2005, and Jayden, born 12 September 2006), Federline worked to start his own recording career. He endured the envy and enmity of Britney's fans and in January 2006 released his first single, "PopoZo," a Portugese-flavored tribute to oversized rumps. Following weeks of rumors that their marriage was in trouble, Spears filed for divorce on 7 November 2006.