La Personne aux Deux Personnes (The Person Who Is Two Persons) (Me Two) (2008)
35% of users liked it
Ranu, a shy accountant, suddenly discovers a completely opposite personality living in his head: 80's singer Gilles Gabriel.
Andrew L. Urban, Urban Cinefile
Not as humorous as I'd like, mind you, and you have to totally surrender to the silliness to make this work.
Fresh (60% or more critics rated the movie positively)
Rotten (59% or fewer critics rated the movie positively)