 On the week charting October 3, 2015, the song charted at number 45 and steadily rose to a peak position of number 18 on November 6, and later reached a new peak of number 8, on the issue dated 12 December, thus becoming Trainor's third and Legend's second top-10 single.It also peaked at number one on the Adult Top 40 chart.In Australia, "Like I'm Gonna Lose You" debuted at number 80 on the Australian Singles Chart issued for June 8, 2015.