Original “American Idol” champ Kelly Clarkson has reclaimed her crown as the show’s best-selling singles artist.

Clarkson’s new single, “What Doesn’t Kill You (Stronger)”, sold 3.51 million copies as of Wednesday, according to Nielsen SoundScan.

That means it’s edged out fellow “Idol” Carrie Underwood’s “Before He Cheats” as the best-selling “Idol” single of all time.

Underwood’s single, released in 2006, has sold 3.5 million copies, according to SoundScan.

“Stronger” is also Clarkson’s longest-running No. 1 single since the hit “My Life Would Suck Without You” in 2009, which topped the Billboard Hot 100 chart for two weeks.

Underwood has still sold more albums than Clarkson — 13.2 million for Underwood versus 11.7 million for Clarkson, according to the Hollywood Reporter.