Overview

• Katy Perry announces her departure from 'American Idol' after seven seasons, citing new music and a possible world tour as reasons.
• Speculation about Perry's replacement includes Alanis Morissette, Carrie Underwood, Paula Abdul, and Jennifer Lopez, with fans and media outlets weighing in.
• Morissette and Underwood are highlighted as strong contenders, with Morissette praised for her previous guest judge appearance and Underwood for her musical versatility.
• Jennifer Lopez and Paula Abdul, both former 'Idol' judges, are also considered possible replacements, with Lopez's upcoming album release adding to the speculation.
• Fans express excitement for Perry's musical comeback, supporting her decision to leave 'Idol' and anticipating her headline performance at Rock in Rio.