Harry Styles is currently in Los Angeles for a 15-night residency at the Kia Forum.
Last Monday, Styles got into the Halloween spirit by dressing as Danny Zuko from the 1978 movie Grease, and performing one of Olivia Newton-John's most famed songs from the flick, "Hopelessly Devoted To You."
The entire band was dressed Grease-themed as well, with some dressed as Pink Ladies and Harry's drummer dressed in Sandy's black cat suit from Grease's final scene.
Newton-John passed away this past August after a long bout with breast cancer.
Harry will be performing in Los Angeles until November 15, after which he heads out on his international leg of his Love On Tour.
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