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Pharrell Williams and Calvin Harris will perform at this year's T in the Park music festival.
Other big acts revealed tonight include Biffy Clyro, Ed Sheeran, Ellie Goulding, Rudimental and Disclosure.
They'll share the bill with Arctic Monkeys and Paolo Nutini, who have already been confirmed for the three-day event at Balado in Kinross-shire in July.
Tickets go on sale at 9am on Friday.