Officials in Concord, Calif., want Whitney Houston to reimburse the city for the $100,000 it spent preparing for a concert she canceled 15 minutes before show time, reports the Associated Press. Houston said she bowed out of an Aug. 1 concert at the public-owned Concord Pavilion because she was ill. (The singer had canceled four earlier dates on her summer tour, citing throat problems and a “bronchitis situation.”) About 5,000 fans were in their seats when the announcement was made, and thousands more were turned around in the parking lot. The Pavilion’s booking agent, San Francisco-based Bill Graham Presents, said Houston’s representatives promise to look into the matter.