AceShowbiz - Grumpy rocker Lou Reed has reportedly broken Susan Boyle's heart by refusing to let her sing his "Perfect Day" anthem on a reality TV show. The Scottish singing sensation, who shot to fame after appearing on a British talent show last year, was due to perform the song on "America's Got Talent".

But when she arrived to soundcheck the tune at the show's Los Angeles studios on Wednesday, September 8, Boyle learned Reed wasn't a fan and had refused permission for her to sing the song. Sources tell TMZ.com Boyle burst into tears and refused to change her tune for the show. Instead, she allegedly headed to the airport intent on catching a flight back to Britain.

Earlier this year, Susan Boyle's debut album "I Dreamed a Dream" was named the world's best-selling record of 2009 by the International Federation of the Phonographic Industry (IFPI). She scored the most popular album across the world - selling more copies of her music debut in the last five weeks of 2009 than any other artist managed across the 12 months.