Britney 2.0 (EP)  Britney 2.0 is an extended play (EP) by the cast of the musical television series "Glee". It contains eight songs from the season four "Glee" episode of the same name, "Britney 2.0", which was the second tribute episode dedicated to American pop singer Britney Spears. The EP is composed of six songs and two mash-ups of Spears songs from her debut album "...Baby One More Time" up to her seventh studio album "Femme Fatale". The EP was only released digitally. The EP debuted at number one on the "Billboard" Top Soundtracks Album chart and at number forty-three on the "Billboard" 200.