Katy Perry bids farewell to ‘American Idol.’ While chatting with ET’s Denny Directo after her final show, Katy reflects on her time in the judge’s seat and what’s next for her. The singer shares her excitement for season 22 winner Abi Carter and talks about how she honored all the past top 24 contestants from her time on the show during the finale. Plus, Katy shares what she’s hoping for in her ‘Idol’ replacement. ‘American Idol’s season 22 finale aired on Sunday on ABC.