Plantadit, who was Tony-nominated for her work in Come Fly Away, and Movin' Out Tony nominee Roberts will duet in "That's Life" during the live results show.
Twyla Tharp earned a Tony Award nomination for her choreography to Come Fly Away, which uses the songs and vocals of Frank Sinatra as its musical palate. The production opened on Broadway March 25 at the Marquis Theatre.
"So You Think You Can Dance" will air live at 9 PM ET. Check local listings.