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Last week Justin Timberlake graciously bestowed upon the world his first new song in three years, "Can't Stop the Feeling," from his upcoming Dreamworks movie, Trolls, which features both his and Anna Kendrick's voices. Wednesday at Cannes, the pair (billing themselves as Anna & Garfunkel) covered Cyndi Lauper's 1986 hit "True Colors" in front of an audience and a hashtag.

Ol' JT is pushing the hell out of this movie, but that's not surprising—he's the executive music producer for the film, and also he just seems like a super enthusiastic guy. The soundtrack will feature new material written and performed by Timberlake, and since singer and former Voice judge Gwen Stefani is in the movie, maybe her, too.