"It quickly became apparent to [producers] Salaam [Remi] and Mark [Ronson] that they had a collection of songs that deserved to be heard, a collection of songs that were a fitting testament to Amy the artist and, as importantly, Amy their friend," a statement on the site says.
Titled Lioness : Hidden Treasures, the 12-track album will feature outtakes, demos and cover songs that the late singer previously recorded.
One new track, "Between the Cheats" — which was written for her never completed third album — will also be on the record, along with some of her prior hits, including Back to Black's "Valerie."
Winehouse died in July at 27 from accidental alcohol poisoning.
Lioness: Hidden Treasures is scheduled to be released on Dec. 5.