. ♪ i love rock 'n' roll >> reporter: feminist phoenix.i love rock 'n' roll >> reporter: to hell. the timberlake breakup. >> it's not what you think. >> you and me, we're done. >> it's not like that, justin! >> reporter: the kevin federline marriage. >> he makes me so happy, i want to spend the rest of my life with him. >> reporter: remember, spears isn't cooperating. you made the movie without using any of her own music. >> that's right. we couldn't. we got the rights to songs she had performed. ♪ i love rock 'n' roll >> ah. >> we have the girls who auditioned for britney sing 80 love rock 'n' roll" in the audition acapella. >> this movie hasn't come out and already people have strong opinions. >> of course, of course. i mean, the two of the most iconic pop stars of all-time suddenly the subject of a film, and they're so beloved. >> there was a section of the internet that is already, having not seen it, saying, i hate this, this is awful. >> i stay away from it. >> reporter: some tweets, #rip, who told lifetime it was okay, a hate crime,