clippers owner steve ballmer will be here. we'll have music from lauren daigle.ek, adam carolla, ellen pompeo, lauren cohan, zlath zlatan ibrahimovic will be here and half-alive and mana. and i have an announcement. a major announcement. we are taking the show on the road to my boyhood home of las vegas, nevada. we will be in vegas, with a menagerie of stars, from april 1st through the 5th. if you live in vegas, and delivered pizza with me, if you worked a the clothing store or sat next to me in algebra, maybe you'd like to meet me. go to kimmelinvegas.com. tickets are free. our first guest is a platinum-selling, platinum-haired music superstar-turned tv judge. on sunday night, she begins a new season of "american idol." please say hello to katy perry. [ cheering and applause ] ♪ >> jimmy: how you doing? you look like -- >> okay, okay, okay. who am i, who am i? i'm an oscar. >> jimmy: oscar, right. >> honestly, i'm not going to lie, i'm not going fake it. he live so close to in and out. >> jimmy: oh, is that right? >> and i am so hungover. >> jimmy: do you think