By Melissa Maerz
Updated July 26, 2011 at 04:13 PM EDT

Since Amy Winehouse died on Saturday, fans have been honoring the British singer by playing her Grammy-winning neo-soul watershed Back to Black, giving the album a posthumous spike in sales.

Within hours of her death, Black climbed all the way to No. 1 on the iTunes charts in the U.S. and the U.K., and stayed there until Monday. (Today, on the U.S. side, Eric Church tops the chart, with Winehouse holding the No. 2 spot.)

Billboard also predicted that, due to sales from over the weekend, Black will re-enter the top 20 on its Billboard 200 albums chart—which comes out on Wednesday and reflects the sales tracking week that ended on Sunday night—with as many as 20,000 – 25,000 copies sold in the U.S. That’s a big jump from the week before Winehouse passed, when Black moved just a little over 1,000 copies, according to Nielsen SoundScan.

Though Black was a major breakthrough for Winehouse, peaking at No. 2 on the Billboard 200 in March of 2008, just after the singer performed on the Grammys via satellite from London and walked home with five statues, Winehouse never released another album.

Several reports noted that she’d been working on a follow-up, recording in the Bahamas and London, and London’s Daily Telegraph reported Monday that her unfinished third album could be released posthumously. While it is believed that Winehouse only recorded demos, sources told the newspaper that there was plenty of material available for another album.