Fox’s live TV production of Grease is less than a week away – so Freeform is repeating this 1978 movie musical at a very well-chosen time. Watch one more time, to compare the performances (and costumes) in this film of Olivia Newton-John, John Travolta and Stockard Channing – as Sandy, Danny and Rizzo, respectively – with the ones coming this Sunday from Julianne Hough, Aaron Tveit and Vanessa Hudgens.