“Double Trouble” just might be the song of the summer. It’s the Eurovision song contest entry from Icelandic duo Fire Saga, played by Will Ferrell and Rachel McAdams in the new Netflix comedy (also written by Ferrell alongside former Saturday Night Live writer Andrew Steele). The film follows Lars (Ferrell) and Sigrit (McAdams), two childhood friends who set their sights on the Eurovision contest after seeing Abba win the 1974 contest with “Waterloo.” Cut to the present day, when the two are still practicing out of Lars’s father’s basement and performing to an unsupportive audience at the local watering hole. Yet somehow Fire Saga ends up in the international spotlight representing Iceland at Eurovision (I won’t spoil how here), and the result is a feel-good romp with plenty of catchy earworms that feel authentic to the Eurovision stage. Those familiar with the contest may find particular joy in the way the film lovingly celebrates the annual extravaganza instead of simply spoofing it, complete with cameos and performances from past Eurovision stars throughout. While Ferrell is reliably funny in his usual role, it’s McAdams who provides some of the most laugh-out-loud moments, continuing to prove herself as a comedic force to be reckoned with.