You can jump to a separate table for each region of the state: Olympic Peninsula & West Coast, San Juan Islands & Puget Sound, Cascade Mountains and Eastern Washington.
1 Taylor Swift held (until this weekend) the fastest selling concert performance at Madison Square Garden for a record of 60 seconds in 2009 (source)  The Who sold out four performances at the venue in 1978 in a matter of hours per one radio broadcast announcement (source)
George Strait (and friends): June 7, 2014. Of course King George tops this list. George Strait hosted the last concert on his last country music tour at AT&T Stadium in Arlington, and the packed house broke the record for largest indoor concert in North America, with 104,793 in attendance.