Junoon (passion), Pakistan's most popular rock band from Lahore formed in 1990 by Salman Ahmed. He is also guitarist, songwriter and medical doctor. At the time, Junoon consisted of two other members: Ali Azmat (vocals) and Nusrat Hussain (keyboards). However, Brian later joined them as a guitarist. They are also regarded as the pioneers of Sufi rock. They sing mostly in the language of Urdu, in a style blending Western hard rock with Sindhi and Punjabi folk and Qawwali. Junoon, in effect, had to create an audience for rock music in Pakistan.

In 1997, Junoon recorded their fifth album, Azadi. Azadi, meaning freedom, was released by EMI/Virgin Records, and became Junoon's debut album in India. "Sayonee", the first single off Azadi, became an instant hit in South Asia and the Middle East, shooting to the top of all the Asian charts, and staying at #1 on both Channel V and MTV Asia for over 2 months.

In 2000, Junoon performed in Japan and as well as at the Roskilde Festival outside Copenhagen, Denmark, which is the premier summer European Rock Festival, along with Pearl Jam, Iron Maiden, The Cure and many others. Junoon performed the largest ever concert in Dubai, UAE, with Bollywood singer Sonu Nigam, with nearly 20,000 in attendance. In June, Salman Ahmad was appointed 'Goodwill Ambassador' of Pakistan by United Nations, attending the UN General Assembly in New York.

In 2005 Ali Azmat, the lead vocalist, left the band to start his solo career. His first solo album "Social Circle" was released in 2005 and received critical acclaim winning several awards. Salman Ahmad also released his solo album. In 2005, Brian O'Connell returned to his native New York. Pakistani musician Mekaal Hasan and the band's producer John Alec have been playing bass guitar for live shows in his place. A reunion concert took place in Dubai, UAE in March 2006. In September 2007, Junoon released three albums, Parvaaz, Infiniti, and Azadi with Magnatune. On December 11, 2007, Junoon performed at the Nobel Peace Prize Concert in Oslo, Norway together with a variety of artists, which was broadcast live to over 100 countries. In 2008, the Pakistani rock band Junoon, performed in Srinagar for the first time and turned thousands of music lovers hysterical.