It's a beautiful day -- or will be on Wednesday, when legendary Irish band U2 perform during the season finale of "American Idol."

Longtime manager Paul McGuinness leaked the news to a reporter after Sunday's Billboard Music Awards.

"Maybe that's supposed to be a secret," he said to a Billboard interviewer backstage after the show, at which U2 won the award for Top Touring Artist.

The news only makes huge ratings even more probable for the results show, on which the Season 10 winner will be announced. The two remaining contestants are 17-year-old Scotty McCreery and 16-year-old Lauren Alaina. They will face off Tuesday in the final performance show of the year.

U2 are rehearsing for their appearance Monday night. No word yet on what song the band will perform, but we're obviously guessing that it'll be their 2000 hit "Beautiful Day."