Producers of the CBS-Grammy Awards all-star concert tribute to Stevie Wonder looked on during rehearsals Tuesday as singers Kenneth "Babyface" Edmonds and Ariana Grande sat on black stools rehearsing Wonder's 1970 hit "Signed, Sealed, Delivered." They quietly debated how to get Grande off that stool and get her a little more animated.
At that moment, Grande leaned into her microphone and asked, "Could I get up and dance here?"
FULL COVERAGE: Grammy Awards 2015
Given Wonder's body of work, Grande's idea was practically beyond...