From PJ Harvey on facebook:

P J Harvey To Perform On The Conan O'BrienShow On April 11th
PJ Harvey accompanied by full band will perform on the Conan O’Brien show on April 11th. The show airs on TBS at 11:00 pm in all time zones across the US.

it's tonight
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I really wished they had performed "The Glorious Land"

Woulda made more sense since its the single right now and also woulda been kick ass to see! Hell it could have waken up anyone watching, at least I think.