American Idol 2005 champ Underwood returned to help close out the Fox series' 15-season run April 7 with an emotional performance of her 2014 hit "Something in the Water." In the tracking week following the appearance (ending April 14), the song gained by 108 percent to 12,000 sold, according to Nielsen Music, and vaults 5-1 on Christian Digital Songs. The ballad spends its 23rd week at No. 1 on the list, and first since March 28, 2015; it debuted at No. 1 on Oct. 18, 2014, and has sold 1.1 million to date.