Éric Greff (French pronunciation: ​[eʁik ɡʁɛf]; born 19 July 1975 in Forbach, Moselle), better known by his aliases Helmut Fritz and Géronimo, is a French singer-songwriter and record producer. Greff is known for his 2009 single "Ça m'énerve", in which he portrays a German dandy living in Paris. The single, produced by Laurent Konrad, was released in March 2009 and rapidly reached number one in France.To reinforce his identification with the song "Ça m'énerve", Éric Greff wrote a fictional biography for Helmut Fritz.

Source: Wikipedia (https://en.wikipedia.org/wiki/Helmut_Fritz)