Amy Winehouse's 9-year-old album "Back to Black" is outselling newer records from Beyonce, Adele and Pitbull, buoyed by critical praise for the documentary about the singer's sudden rise and fall.

"Amy" has grossed more than $11 million worldwide since its July 3 release, according to Box Office Mojo. [The film has yet to see a possible release date in Japan.] It chronicles the life of the British pop star, whose musical success and struggle with addiction played out in tabloids before she died of alcohol poisoning in 2011 at the age of 27.

What distinguishes "Amy" from other rock documentaries is that the film was produced and financed by Universal Music Group as part of a bigger push into movies. Chief Executive Officer Lucian Grainge wants the world's largest label to gain a greater share of what fans spend on his artists. The company was also behind "Montage of Heck," about Nirvana frontman Kurt Cobain.