 "I Knew You Were Trouble" also became her seventh number-one song on the "Billboard" Hot Digital Songs chart, which tied her with Britney Spears as the artist with the third most number one hits on that chart.Thirty-three unsolicited plays from Los Angeles radio station KKGO enabled the song to debut at number 55 on the "Billboard" Country Airplay chart in April 2013; it spent only that week on the chart.The song also attained commercial success worldwide, reaching top ten in ten countries.