"Disco Inferno" is one of Tina Turner's most popular songs for several reasons. One reason is that it was featured in the film "Tommy", which helped to give it more exposure and popularity. Additionally, the song was released at the peak of the disco era, and Tina Turner's version was able to capture the essence of disco music and appeal to the audiences who were into it.

Also, Tina Turner was a well-established, highly successful artist with a large and dedicated fanbase, which helped to give her version of the song more visibility and recognition. Furthermore, the song's catchy hook, high energy and the powerful vocals she delivers on the song made it a perfect fit for dance parties, and that helped it to become a classic anthem of the disco era.