Fabrice Lucchini is a frail-looking, slightly manic, literary type who is perfectly capable of doing highly successful one-man shows where he reads poetry. Casting him as a middle-class washout whose sole passion is the music of a 60-year-old rocker sounds odd, but it works.
And one night Fabrice (both the lead characters use their real first names in the film. There may or may not be a reason for this) takes a bump to the back of his head and wakes up in a parallel universe where his idol, Johnny, never made it to the French equivalent of "Opportunity Knocks", was never Discovered, never became a star...
Johnny Hallyday is the stage name of one Jean-Philippe Smet (hence the title). Think of him as,say, the French equivalent of Cliff Richard. Still going strong at 60, whether or not you like his music you have to recognise he has undeniable talent as a musician. He also turns in quite a creditable performance for the film, and is a realistic counterweight to the effervescent Lucchini.
The film is a pleasant, and eminently watchable, comedy. There are plenty of good jokes, although those who don't follow French popular culture might miss one or two references. It shouldn't spoil the film. Enjoy.
