"Those are monumental numbers and I figured we’d do something special with them"
She also begged Lizzo to be the fourth judge on 'American Idol'
Take That and Lionel Richie are also on the line-up for the Windsor Castle gig
Katy Perry's 2015 Super Bowl halftime performance previously held the title
"The reason I know your name is I'm a huge fan of your TikTok – you're a really good dancer"
The gig will take place in the grounds of Windsor Castle next month
She is now the fourth most followed Twitter account in the world
Stewart was inducted into the Rock & Roll Hall Of Fame last year alongside 'American Idol' judge Lionel Richie
"You are a hero in real life too"
"Our country has fucking failed us!"