Kesha (b. 1987) is a pop musician who became famous for her hit single "Tik Tok." In 2017, she wrote a song about rainbows.
She makes a cameo appearance in The Muppets Mayhem singing with the Electric Mayhem in "The Times They Are A-Changin'."
Kesha has recorded with Dolly Parton, Iggy Pop, Wiz Khalifa, and Brian Wilson, and appeared in Katy Perry: Part of Me, A Ghost Story (with Casey Affleck), and Jem and the Holograms (with Molly Ringwald).