[4] He grew up in Sarcelles (Val-d'Oise) and immigrated to Israel in 1992 at the age of eight as part of Aliyah; the family settled in Herzliya, north of Tel Aviv.

Not winning in the season, he finished his obligatory military service in the Israeli Defence Forces and continued his studies in dentistry in Hebrew University of Jerusalem graduating in 2012.

His song "Kache limtso milim", the Hebrew version of Patrick Bruel's French hit "J'te l'dis quand même", came alongside a music video.

At the end of the competition, Haddad was signed to a French label,[4] creating a following in France, Switzerland, the United States and Brazil in addition to Israel.

He cooperated with a number of artists, notably Shlomi Shabat, Haim Moshe, Dudu Aharon, Gad Elbaz and Eyal Golan.

In the blind auditions, Haddad sang "Candle in the Wind" from Elton John with all four coaches, Garou, Mika, Jenifer and Florent Pagny turning their chairs.

On Saturday, February 24th, 2018, Anto, Amir's cousin, participated in the blind auditions of season 7 of The Voice[13] on TF1 and joined Zazie's team.

The song titled "J'ai cherché" is co-written by Amir himself, Nazim Khaled and Johan Errami and contains lyrics in a bilingual mix of French and English.

[17] "J'ai cherché" was edited and remixed by Skydancers and Nazim Khaled at the request of the French broadcaster since the song exceeded three minutes in its original version, which had already been released as the first single from Amir's forthcoming album.

He joined Stéphane Bern and Marianne James as a commentator for France 2 at the grand final of the Eurovision Song Contest 2017 in Kyiv on 13 May.

Along with 2019 Swedish Eurovision representative John Lundvik and famed Swedish composers Peter Boström and Thomas G:son, Amir helped co-write the song "Mon alliée (The Best in Me)" for Tom Leeb, who was chosen to represent France at the Eurovision Song Contest 2020 in Rotterdam, Netherlands, before it was cancelled.

[26] On November 1st, 2024, Amir and his wife revealed they were expecting their third child during the NRJ Music Awards 2024 when Lital appeared with a rounded belly on the red carpet.