Choreographer Twyla Tharp has been making dances for six decades, and she's still creating at 82. Her latest production is a three-part show, “Twyla Tharp Dance,” at New York's intimate Joyce Theater. It begins with an oldie, the 1975 “Ocean's Motion,” set to the music of Chuck Berry, with five dancers strutting the stage, exuding the cool of the music. It ends with a happily chaotic ballet about a choreographer trying to create. But the evening's highlight, writes Associated Press critic Jocelyn Noveck, is a soulful, introspective piece created for Herman Cornejo, the dashing Argentine star of America Ballet Theatre.