Looking ahead to more concerts coming up: Click Track posted this morning that Ke$ha will headline the Patriot Center on August 21 (with Baltimore-native Spankrock scheduled to open.) Tickets go on sale on Friday at 8 a.m. Then, two hours later, tickets go on sale for A Perfect Circle’s July 17 show at DAR Constitution Hall. Also on sale Friday: Tickets for DC101’s annual chili cook-off at RFK Stadium on May 21. Weezer will headline over Seether, Papa Roach, Panic! At The Disco, Neon Trees, Paper Tongues and Middle Class Rut. Tickets also go on sale Friday at 8 a.m.