MTV.com News — Could any of the fill-ins replace Simon, or should they never be asked back? Our 'Idol' expert takes a closer look.By Jim Cantiello Katy Perry Photo: Kevin Mazur/WireImage With Paula Abdul moving on to bigger and better things (TBD), "Amer... more info

Idolator — Although we personally relished Avril Lavigne’s ruthless turn as a devil-horned guest judge on American Idol last night (what can we say, we like a bold and brash personality), the Canadian pop tart’s tunes are still up for debate. Surfacing toda... more info

Pop Crunch — Less than 24 hours after she guest-judged on American Idol, tough-talking pop princess (and soon-to-be divorcee) Avril Lavigne surprised debuted her first new song in over two and a half years with Idol host Ryan Seacrest. The song, “Alice,” is ... more info

AngryApe — When she appeared as an American Idol judge more info

Starpulse — Last night was a vintage "American Idol" auditions show. It was a perfect mix of bad and good with the appropriate judges comments to match.[...] Read more! more info

MTV.com News — 'I make 'em cry all the time,' she jokes about her guest-judging gig.By Jocelyn Vena, with reporting by Matt Elias Katy Perry Photo: Ross Gilmore/Getty Images As the "American Idol" auditions continue making their way around the country, w... more info

AngryApe — Despite the pair ending their three year marriage more info

Jam! Showbiz Music, Canada — Avril Lavigne has dismissed rumours her upcoming album has been hindered by her fractured working relationship with ex-husband Deryck Whibley, insisting they are still the best of friends. more info

VH1 News — Katy Perry and Avril Lavigne sat through mostly boring L.A. auditions. Perry got snippy with Kara DioGuardi, which was the only interesting thing about Tuesday's show. more info

Mjsbigblog — So… Avril Lavigne was a complete waste of space on the panel. The only semi-interesting thing she had to say was to the Worship leader/Dad Jim Ranger, questioning whether he could manage a showbiz career with church and family. But really, it’s m... more info