The famous besties' mutual ex Joe Jonas starred in the show as the band leader at Rydell High's school dance
The famous besties watched the show together Sunday night, and Hadid, 20, took to Snapchat to document the duo singing along to Sandy’s famous ballad.
“We’re also performing Grease Live in the living room,” Hadid captioned the video as she filmed Swift, 26, and her crooning away.
“Hopelessly Devoted to You,” made famous by Olivia Newton-John in the 1978 film version of the classic musical, wasn’t actually part of the 1973 Broadway production – but Fox’s live telecast of the musical still included the popular ballad, moving it to later in the production.
As it happened, Hadid and Swift’s mutual ex-boyfriend Joe Jonas actually starred in the show, taking the stage at Rydell High’s school dance with his DNCE bandmates as Johnny Casino and the Gamblers (portrayed by the group Sha Na Na in the original movie).
Hadid and Jonas, 26, split in November after five months together, while Swift and the former Jonas Brothers singer dated for a few months in 2008 until he broke up with her in what she described as a 27-second phone call. (At the time, Swift said Jonas was the only guy to ever hurt her “deeply.”)