VIDEO : 'Britney Ever After' Stars Get The Ultimate Quiz On Britney Spears

Lifetime's new movie 'Britney Ever After' is giving fans an inside look into Britney Spear's life from young adulthood till now. However, how well does the cast know Britney since doing the film? E! News brought lead actors Natasha Bassett and Nathan Keyes in for a round of questions to see just how much they know. The duo got a lot of the questions right except for which Britney song Justin sang back up for which was was "What It's Like To Be Me."