(Bettina Hansen)

By Devon Geary
Seattle Times staff reporter

When a ringmaster-like host pointed at a timid platinum-blonde sitting in the bleachers at KeyArena on Sunday and told her she would soon learn the “truth about love,” no one expected her to be Pink — or imagined she would soon bungee-launch into the sky from a hole in the stage.

Three men suspended upside down from an intricate wire structure caught Pink, who sang “Raise Your Glass” while she bounced and flipped — her voice like red wine with a flirty finish.

Pink’s over-the-top “The Truth About Love” tour is a circuslike extravaganza combining music, dancing, aerial routines and even single-handed pushups by the athletic star. If you’re in need of a serious girl-empowerment buzz, the Grammy-winning 34-year-old will surely set your hair on fire with such hyperkinetic pop-rock hits as “Blow Me (One Last Kiss),” “Try”…