Idol’s Casey James Wishes He Would Have Kissed Shania Twain

 Michael Becker/FOX; Dimitrios Kambouris/Getty Images

Ah, regrets!

American Idol contestant Casey James tells he didn't hear Simon Cowell urging him to kiss guest mentor Shania Twain on Tuesday night's show.

"Is that what he said? See, I want them to crank up the monitors because if I had heard it, I would have laid a big one on her," the 27-year-old Texas rocker told Us. "I would have went for it."

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A witness told Us that Ryan Seacrest was ribbing him about the missed opportunity during the commercial break.

Love was clearly in the air on the Fox show.

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Crystal Bowersox, 24, performed Twain's song "No One Needs to Know" for her boyfriend, Tony, who "raised his arm in the audience and blew her a kiss" after. (He is not the father of her baby boy, Tony.)

Bowersox told Us she didn't tell him she was dedicating the song to him beforehand. "He knew the song I was singing and he was like, 'Are you singing this for me?' I was like, 'Oh, well, you know, maybe. He's funny."

Aaron Kelly showed his affection… for his mom, with his tune, "You've Got a Way."

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"I changed [the lyrics] so that it fits," he told Us. "'You gave me faith to find my dreams.' She pretty much encouraged me, she's been the whole reason I'm in this competition… She's always given me the strength to keep going in everything I do."

(The original lyrics included: "It's in the way we make love." Kara DioGuardi quipped that she presumed the 17-year-old is a virgin. Twain liked the performance, though, and mouthed "lovely" as he took the stage.)

Kelly's mom wasn't in the audience ("She was watching on TV," he said), but Season 5 finalist Blake Lewis was "sitting on the edge of his seat" during the show.

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