American Idol opened up a lot of doors for Katherine, especially in her acting career. Her first big-screen role was in House Bunny alongside Anna Farris, which was a huge hit. She's most famously been in the Broadway play Waitress since 2018.
Emma Stone - In Search of the Partridge Family
She's a bit unrecognizable, but that is a picture of young Emma Stone! Before she hit Hollywood stardom with Easy A and Lala Land, she was on the reality show In Search of the Partridge Family in 2003. She was only 15-years-old!