For its tenth anniversary in 2011, Sasquatch! Music Festival has added a fourth day — Friday — and already announced the extra day’s headliner, the Foo Fighters, whom Sasquatch! curator and founder Adam Zacks calls “a great American rock band with roots in the Pacific Northwest.” 2011’s festival will go from May 27-30, and in another new twist, 4-day “all-in” passes are being sold. These passes include festival admission, camping, and service fees, and will be available for purchase this Saturday, November 20 at 10am at sasquatchfestival.com (just in time for the holidays. Very clever!) The Festival’s complete line-up will be announced on February 7, but I’m guessing with the event as popular as it already is, most of you won’t even need to wait til then to buy your tickets.