Johnny Hallyday returns, in the head (and voices) of Didier Gustin

Review In this comedy and song show, the actor and imitator gives it his all.
Poster for the show "Johnny, Free in My Head" by Didier Gustin and Eric Bouvron. DIDIERGUSTIN.FR
Johnny Hallyday is bored in paradise, where he regrets not having been given a proper tribute concert. To finally get one, he comes to haunt Didier Gustin here below by taking up residence in his head, and tasks him with scouring French songs. The goal: nothing less than a grand show at the Stade de France. The actor and impersonator, who presents himself as a has-been— "Johnny, free in my head" is worth its weight in self-deprecation and humor—then embarks on a journey to convince artists to participate in a tribute.
He thus reviews the present and past glories of song, and even some deceased ones like Charles Aznavour. Not without suffering repercussions on his life (his wife does not appreciate the situation very much, he is obviously taken for a madman), he embarks on the roads of France. His character is rebuffed, advances as best he can, and his encounters give rise to very successful covers of the works of the late Jean-Philippe Smet "in the style of" this or that.
Present and past voices, Didier Gustin's remarkable vocal talent puts Johnny Cash's classics into the mouths of dozens of characters, and the result is delightful. While his imitations are all convincing, accompanied by three musicians, the passages of Eddy Mitchell, Fabrice Luchini, and Alain Bashung are particularly memorable.
Le Nouvel Observateur