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.