El-Haggar works with famous composers and lyricists as well as with other singers in duets whenever possible. "In duets I like to deal with talented singers; as competing with clever singers motivates me to explore my capabilities to execute the song in the best distinguished manner". 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.
Another important phase in El-Haggar's professional life was his first collaboration with his brother, the composer and singer Ahmed El-Haggar. This was in 1978 when Ahmed El-Haggar composed his brother's hit "Ozoriny". The success that this song achieved sparked El-Haggar's singing career. The El-Haggar brothers have co-operated in many other songs, Ahmed El-Haggar as composer and Ali El-Haggar as lyricist. 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".
El-Haggar was awarded a prize of honor in the 15th Arabic Music Festival for the year 2006 as well as two prizes from two different European theatre festivals in both Germany and Italy.[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".
