Mumford & Sons Look Back, Head Forward On 'Live At Letterman'

Ahead of tonight's 'Saturday Night Live' performance (and new album Babel), band tapes 'Letterman' set.
By James Montgomery

Mumford and Sons
Photo: Kitra Cahana/ Getty Images

Source:
http://www.mtv.com/news/articles/1694283/mumford-and-sons-letterman-snl.jhtml

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