'Idol's' Stage Dad Ban

Simon, Ryan and David Archuleta's vocal coach all sound off on "American Idol" stage dad from hell, Jeff Archuleta. Note-by-note, "Extra" has every angle of the controversy surrounding the dad's backstage ban!

Jeff is forced to watch from the audience as 17-year-old son David performs tonight on TV's biggest stage -- all because he convinced David to change a lyric in his performance of "Stand by Me" -- costing the show a bundle of money.

Today, David's voice coach Dean Kaelin is rushing to Jeff's defense. "All of these comments about [Jeff] being a stage dad and being overly obsessive really surprised me," says Kaelin. "I've never seen him be overbearing or aggressive."

Even Mr. Mean himself, sharp-tongued "Idol" judge Simon Cowell bowed out of this battle. "To be fair to him, I don't really see him," said Simon, "I don't know what he does." Host Ryan Seacrest weighed in, saying, "David's still young so he needs to have somebody there with him."