Source: Susan Boyle “Heartbroken” by Lou Reed Dis

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Susan Boyle probably didn't dream a dream of this. Late Wednesday, TMZ reported that the singer stormed off the L.A. set of America's Got Talent in tears.

The reason? Boyle had planned on singing her cover of Lou Reed's "Perfect Day," set to appear on her Nov. 1 album The Gift — but two hours before her planned taping, songwriter Reed abruptly refused to allow Boyle to perform the song.

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"The bit about her storming off is not true," an insider tells Instead, Boyle "was still in her the hotel, getting ready to go to the studio" when she learned of Reed's unexpected dis.

Still, the source confirms, Boyle "didn't have any time to prepare anything else, so the whole thing had to be scrapped."

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The Scottish star didn't take the news lightly, the source says. "Susan is a very sensitive soul, and she takes her work very seriously…she was very upset about the situation."

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Adds the insider: "She knew a lot of of fans had flown in especially to watch her perform and felt she had let them down. She was heartbroken and had put so much effort in to this performance. It's a real shame."

Reps for Sony BMG and Boyle had no comment on the matter.

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