Don't believe me? Just listen to his incredible cover of Swift's recent hit "I Knew Your Were Trouble." He's also quite the songsmith himself, as his personal reworking of the song's lyrics to reflect the troubled relationship between him and certain hobbitses proves.
In related news, I'm pretty sure Middle-Earth's biggest Ke$ha fan is Saruman, but that's just a hunch.
[Via Geeks Are Sexy]