Let It Go is the breakout song from Disney's Frozen, released in 2013 and performed by Idina Menzel as Elsa, and it quickly became one of the most parodied songs of the decade. Cartoon voice covers followed almost immediately, with Mickey Mouse versions swapping Elsa's powerful vocals for the mouse's unmistakable falsetto. Those parodies spread through YouTube edits, meme pages and soundboards, where the short clip format made it easy to drop into reaction videos. It endures because the melody is universally known, so the joke lands instantly even without any setup.