Folk-rockers Mumford & Sons recently made an appearance on Philadelphia's Radio 104.5 FM, where, as a special surprise, they debuted a brand new song called "Ghosts That We Knew." You can watch video from the performance below.
Of course, this isn't the first new track Mumford & Sons have debuted live during a radio performance lately, as earlier this year they debuted a new song, tentatively titled "Home," during an intimate concert for a Colorado radio station.
Mumford & Sons are expected to release the follow-up to 2010's Sigh No More sometime in 2012.
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Josh Hart is a former web producer and staff writer for Guitar World and Guitar Aficionado magazines (2010–2012). He has since pursued writing fiction under various pseudonyms while exploring the technical underpinnings of journalism, now serving as a senior software engineer for The Seattle Times.

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