GREASE: LIVE: (L-R) Aaron Tveit as 'Danny Zuko and Julianne Hough as 'Sandy' rehearse for GREASE: LIVE airing LIVE Sunday, Jan. 31, 2016 (7:00-10:00 PM ET live/PT tape-delayed), on FOX. (Photo by Kevin Estrada/FOX Image Collection via Getty Images)
GREASE: LIVE: (L-R) Aaron Tveit as 'Danny Zuko and Julianne Hough as 'Sandy' rehearse for GREASE: LIVE airing LIVE Sunday, Jan. 31, 2016 (7:00-10:00 PM ET live/PT tape-delayed), on FOX. (Photo by Kevin Estrada/FOX Image Collection via Getty Images)