One thingChers careerhas never been is predictable.

As a teenager in the Sixties, she cut her teeth with future husbandSonny Bonoand producer Phil Spector.

She and Sonny ended up reviving their careers with a variety show until they divorced.

Cher performing on stage on her “Do You Believe” world tour. (Photo by Barry King/WireImage)

Cher performing on stage on her “Do You Believe” world tour.Barry King/WireImage

Cher would then launch a successful solo career, with both disco music and her own new TV hour.

By the mid-Nineties, however, Cher hit another lull.

She was dealing with chronic fatigue and was left hawking items in infomercials.

Believe was released in 1998, becoming the singers signature hit and the best-selling song of her entire career.

Its our celebration of the greatest songs ever made and a breakdown of what makes them so great.