Adventure Time | Happy Ending Song (New Marceline Secret Track) | Cartoon Network

A previously unheard track from Marcy’s bedroom recording sessions, based on 500 years of her diary entries. The melody sounds eerily familiar but why? The only problem being, that no one can ever hear it. EVER! Subscribe to the Cartoon Network UK YouTube channel: Visit the Cartoon Network UK website: Welcome to the official Cartoon Network UK YouTube channel, the place where you can watch funny videos, clips with theme tunes and songs and interactive game plays from The Powerpuff Girls, Adventure Time, The Amazing World of Gumball, Regular Show, Ben 10, We Bare Bears, Uncle Grandpa, Steven Universe, Clarence, Teen Titans Go!, Ninjago and many more. Get ready to laugh out loud and join us by subscribing to the channel!