According to the Associated Press, Aretha Franklin canceled an appearance at Whitney Houston's funeral because of spasms in her legs. Hours later, the "Queen of Soul" (the "undisputed" Queen, the capacity audience was reminded by the show's announcer) was quick on her feet, feisty in voice and sentimental and sassy in spirit at Radio City Music Hall on Saturday night. It was the latest stop on a "greatest hits" tour featuring old favorites and, since Houston's shocking death a week ago, a tribute to the fallen singer. Franklin is close to Houston's family, and she said Houston called her "Aunt Ree."