I always thought La Vie en Rose was an Edith Piaf song but according to this Youtube description, the song was first sung by Marianne Michel.
Piaf was involved in the writing of the song but thought it was too mournful until the song began to become popular and she remembered her role in its creation.
There are countless Youtube renditions of La Vie en Rose but I especially liked this Andrea Bocelli version….
… and eight year old Erza in the final of the 2014 France’s Got Talent.