First released as a single, "The Ballad of Bilbo Baggins" by Charles Randolph Grean pays homage to Tolkien's "The Hobbit" and was sung by Spock himself, Leonard Nimoy. It became a folk hit in the late '60s, and was rediscovered decades later by fans on YouTube.
In this IGN video, the stars of "The Hobbit: The Desolation of Smaug" perform a dramatic reading of Nimoy's famous song. The video proves once again that actor Benedict Cumberbatch can make even a campy song sound like a Shakespearean sonnet.
And here's the original music video of Nimoy singing "The Ballad of Bilbo Baggins." Nimoy, still in his signature "Star Trek" coiffure, sings alongside go-go dancers wearing pointed ears worthy of both Vulcans and Hobbits.