American Idol Katy Perry's Witness tour delayed, opening acts include Carly Rae Jepsen 08/17/2017 Katy Perry has pushed back the start of her upcoming Witness tour by more than a week due to "unexpected production delays." Read More RELATED NEWS 'American Idol' couple Gabby Barrett and Cade Foehner expecting their first childKaty Perry honors late friend and mentor: "I am incredibly grateful"Bobby Bones joins 'American Idol' as in-house mentor for Season 17 TAGS: American Idol Katy Perry Carly Rae Jepsen Noah Cyrus
