"Varúð" (Icelandic for "Caution") is a song written and recorded by Icelandic post-rock band Sigur Rós for their sixth studio album, "Valtari". It appears as the third track on the album. The song was released as the second official single from the album on August 21, 2012 on a 10" gramophone record in support of their then-current Sigur Rós World Tour. It is also notably the first release by Sigur Rós under XL Recordings after the liquidation of EMI and the selling of its subsidiaries, including Sigur Rós' then-current label Parlophone. The song was used as a backing for an interpretive dance in the thirteenth season finale of "It's Always Sunny in Philadelphia".
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