Must List for March 17 - 'adventure time' finale and more.

Adventure Time ends its season with a rap battle and Dancing With the Stars begins its season with a rap battle. One of those statements is a lie! This is EW's Must List for Monday, March 17. Andy Samberg plays a rapping bear named Rap Bear on the season finale of Adventure Time. He challenges Finn to a rap battle: Just like in 8 Mile! But that's just the beginning, as Finn sets off on a journey of self-discovery, which involves facing off against the Fear Feaster, a demon who lives inside his belly button. Just like in 8 Mile! This month sees the release of Out Among the Stars, a collection of 12 lost Johnny Cash recordings. The album's not out until next week, but you can watch a music video for "She Used to Love Me A Lot," filmed by John Hillcoat. The video presents a sequence of the bleak, ravaged, broken American countryside, while Cash sings lyrics describing the end of a ruined love affair. And if that doesn't sound depressing enough: Dancing With the Stars is back for its one millionth season of glitz, glamour, and quotation marks around the words "glitz" and "glamour." If you're in the mood for nostalgia, then you can thrill to the showdown between your '80s sitcom bests Candace Cameron Bure and Danica McKellar. Or you can just enjoy the actual-good-dancing performed by Meryl Davis and Charlie White, recent Olympians and this season's unofficial will-they-or-won't-they couple. Hip-hop's international man of mystery Jay Electronica still has yet to release his long-rumored full-length album. But you can get a preview of that album, maybe, with the just-released "Better In Tune With The Infinite," an evocative track. It opens with samples that mixes together Elijah Muhammad quotes and The Wizard of Oz, so it's the perfect background soundtrack to Dancing With the Stars. That's all for today, but check back tomorrow for Must List Details on the DVD release of Frozen, which I think is a Disney movie about the proper maintenance of Ice Castles.