Katy Perry 'almost accidentally killed' Lionel Richie after taking tumble on 'Idol'

Katy Perry! ET's Matt Cohen spoke with the pop star during  on Sunday, which just so happened to fall on Mother's Day. Perry not only shares how she spent the special day with her and Orlando Bloom's 1-year-old daughter, Daisy, but also what being a mom means to her. «One of my favorite things to do is ride bikes and so I got to ride bikes with my daughter this morning to breakfast,» the judge reveals how she spent Mother's Day morning. «We woke up, we were on the bicycle, it was beautiful.

Katy Perry knows what she’s doing as a judge on American Idol. She just doesn’t know how to do it while wearing a mermaid costume!!

Nicolina Bozzo showed off her villainous side on Sunday’s “American Idol”.

Katy Perry took a hilarious fall during the latest instalment of American Idol.The American pop star, who recently revealed how stars wee while wearing difficult outfits on the red carpet, was dressed as The Little Mermaid's Ariel during the competitive singing series' Disney Night on Sunday. However, the stiff outfit proved problematic from the beginning as she was helped to the seat by fellow judges Lionel Richie and Luke Bryan and host Ryan Seacrest. And just as Ryan began introducing the first contestant, he was interrupted by a dramatic and loud crashing sound before the camera panned around to show Katy on the ground and her fishtail up in the air.

Katy Perry is giving fans a behind-the-scenes look at how she squeezed into that Ariel costume for Disney Night on American Idol.

, and Katy Perry once again pulled out all the stops. The pop star and judge kept up her tradition of rocking an elaborate costume for the occasion — and this year's might be the most cumbersome of them all.Perry decided to go as Ariel, from, but took it a step father than one usually would with an Ariel costume.

Katy Perry almost ended up “under the seat” during the latest episode of “American Idol”.

Ouch, that had to have hurt!

by her ex everywhere she goes…even at work.Now happily engaged to Orlando Bloom, has suffered her share of heartbreak, including a rocky marriage to Russell Brand and a passionate but doomed relationship with John Mayer (is there any other kind of relationship with John Mayer?). But the youths of today don't know their history, and on a recent episode of American Idol, a young contestant sang a John Mayer song and then guessed that Perry had picked it out (judges picking songs was part of that week's gimmick; it's not important).This content can also be viewed on the site it from.After 20-year-old Noah Thompson sang Mayer's 2009 hit “Heartbreak Warfare” and guessed that Katy Perry had chosen the song, the “Roar” singer replied, “Noah…I feel like maybe you should Wikipedia me.”Smiling but stressed, Perry yelled, “I'm triggered!” and slid out of her seat and onto the floor.

“Heartbreak Warfare,” indeed.Katy Perry had a hilarious reaction to a Top 11 contestant on “American Idol” during a song challenge.The contestants took part in a “Judges’ Song Contest” where each contestant picked one of three songs to perform without knowing which judge chose the song and had to guess who it was.Noah Thompson selected to sing John Mayer’s 2009 hit “Heartbreak Warfare.” The contestant, 20, from Kentucky then guessed to host Ryan Seacrest that Perry had chosen the song for him. “I picked Katy,” said Thompson, clearly unaware that Mayer and Perry had dated.

Some friendly advice. Katy Perry had a hilarious reaction when an American Idol contestant sang a track by her ex-boyfriend John Mayer — and she offered him a tip he could use in the future.

Katy Perry has often had moments of hilarity on American Idol, but on the show's latest episode, an unexpected moment ended up a little more awkward for her than expected.MORE: Katy Perry leaves viewers stunned in whimsical green pantsuit live on American IdolThe latest live episode of the show on Monday night featured the Judge's Song Contest, a segment where each contestant was anonymously given a song chosen by the judges and the song they'd perform would net that judge a point.VIDEO: Katy Perry's husband Orlando Bloom cuts a turkey on ThanksgivingFor contestant Noah Thompson, he was given a choice of three songs, two of which ended up being by John Mayer and one by John Denver.While he initially leaned toward the John Denver song, he ended up opting for the John Mayer track Heartbreak Warfare, delivering a performance that impressed the judges.MORE: Katy Perry updates fans with baby number two newsHowever, the moment quickly turned slightly uncomfortable when Ryan Seacrest asked Noah who he thought chose the song, and he picked Katy, unaware of her history with the singer-songwriter, having been in an on-and-off relationship with him.She quickly tried to figure out how to react as the audience let out a few knowing chuckles.

Katy Perry had the perfect response to an “American Idol” contestant who clearly didn’t know she used to date John Mayer.

Katy Perry had a hilarious reaction during the latest American Idol episode when a contestant tried to connect her to John Mayer.