2. Kelly Clarkson
Winner, Season 1
Number of albums sold: 17,915,000
Net worth: $28 million
Winning the first ever season of the iconic show, Kelly Clarkson is often titled as the “Original American Idol”. Her career kicked off with a bang as her first ever single Before Your Love, which was released simultaneously with A Moment Like This, became the best-selling single of the year 2002. Her first studio album, which came out the following year went straight to number one on the Billboard 200 and was subsequently certified as double platinum. Furthermore, she has won three Grammy Awards out of a total of twelve nominations.