Is Kelly Clarkson a Bigger Idol than Carrie Underwood? Billboard Has the Answer.

According to Billboard Kelly Clarkson is the most successful American Idol winner of all time with Carrie Underwood coming in second.

Even though Carrie has sold more albums, Billboard also includes other numbers. And, of course, Kelly came on the scene several years before Carrie so she’s had more time to sell records and have them played on the radio.

Here are Billboard’s numbers:

Kelly has sold 10.6 million albums, 15.9 million tracks and has had 4.2 million radio plays.

Carrie has sold 11.5 million albums and 13.9 million singles. And, she’s had 2.4 million radio plays since she won “Idol” in 2005.

Do you want to know how the rest of your favorite "Idols" ranked? Check out this LINK for the Top 24 American Idols, according to Billboard.