[1][2][3] El-Haggar works with famous composers and lyricists as well as with other singers in duets whenever possible.

During his career El-Haggar has performed a number of duets with singers such as his career companion Mohammed El-Helw, in songs such as "Beladi" and "Khan El-Anadeel" (the opening and closing of a TV serial carrying the same name), with Hanan Mady in many television serial songs like "El-Likaa El-Tany & El-Mal we El-Banoon", with Angham in the play "Rosasa Fi El Qalb", and with Hoda Ammar in "Bent we Walad" from the movie Eskendereyya New York.

The success that this song achieved sparked El-Haggar's singing career.

Among these songs are: "Bahebek", "Ana Biki Ya Samra Akon", "El-Ahlam", "Kont Faker", "Tesaaliny", "Lama El-Sheta Edo’o El-Biban", "Ma Tekdebish", "Ergaaily", "Lessa El-Kalam", and recently "Ya Masria".

[clarification needed] He also received "Best Singer of the Year" in a Sharm El-Sheikh video clip festival for his song "El-Leil Ya Nas".