Underwood's first greatest hits compilation, "", was released on December 9. The album's lead single, "Something in the Water", became a crossover success. It reached No. 1 on the Hot Country Songs chart, becoming her fourteenth number-one hit on that chart and her second in 2014. With fourteen number ones, she holds the record as the female country artist with the most number-one hits on the Hot Country Songs chart in the Nielsen SoundScan era (since 1991) in the "Guinness Book." The song topped the Hot Christian Songs chart and has held the top spot for multiple consecutive weeks. It debuted at No. 24 on the Hot 100 chart as well. The song set and broke multiple airplay records on Country radio in its first week. In February 2015, "Little Toy Guns" was released as the second single from the compilation. The track peaked at number six on Billboard's Hot Country Songs, number two on the Country Airplay Chart and number 47 on the Hot 100. The song was nominated for Best Country Solo Performance at the 58th Grammy Awards. The compilation debuted with the biggest sales debut for a hits collection in any genre of music in more than six years and the biggest first-week sales for a female hits album in any genre in over nine years. She earned $10 million between 2013 and 2014, topping Forbes' list of the top-earning "American Idol"s, and $8 million between 2014 and 2015.