Scottish singing sensation Susan Boyle's debut album has topped the bestsellers list on amazon.com even months ahead of its release.

The singer's album I dreamed a dream will not go on sale until November 23, but thousands of copies have already been sold to fans who placed early orders on the shopping website, reports thesun.co.uk.

The CD is even outselling American artist Whitney Houston's comeback album as well as other pre-release titles such as the Twilight soundtrack.

The album features a cover version of Madonna's 1995 hit You'll see, which the 58-year-old insisted was part of her debut.

"It's a song she has loved for years. She sang it at auditions for TV shows and music contests when she used to be cruelly turned away by people," said a source.

"At the end, when she was sometimes reduced to tears, she used to say 'You'll see'. And she's proof she can do it now as one of the most famous women in the world," the source added.

Boyle wowed the world earlier this year when footage from her audition for TV show Britain's Got Talent turned her into an Internet sensation. The singer didn't win the contest, but she became the show's biggest star.