It's a collection of events and complementary details about the life of singer Britney Spears. The movie tries to take a full look at Britney's life from her separate year in 1998 to her quick marriage in 2004. Things seem to be getting complicated completely due to her bad separation with Justin Timberlake, which sparked great controversy during that period.
The film should either introduce something new or at least retell familiar events in a compelling way to be worthwhile, but Britney Ever After does neither.
