On the <strong>Tuesday, September 28</strong> episode of pop phenomenon "Glee," singer and actress <strong>Britney Spears</strong> finds herself the subject of music and mayhem as the cast of the primetime drama series sings all about "Britney Britney." In the episode, look for a number of song and dance numbers spanning Spears' long career in the music industry, including numbers off of her CD's "Baby One More Time...," "Oops! I Did It Again," "Britney," "In the Zone," "Blackout" and "Circus."