It was released in Europe on 15 September 2014 through Republic Records as the first single from Bay's second extended play of the same name.

The song was written by Bay with Paul Barry and produced by Jacquire King.

A week after that, the song entered the top 10 of the chart, peaking at number 10.

"Let It Go" is Bay's first song to chart on the Billboard Hot 100, reaching number 16.

[2] Gregory Robson of AbsolutePunk called "Let It Go" a "rising current of despondency, heartache and powerhouse vocals" and "the clearest example of who exactly Bay is, that is, supple instrumentation, gauzy textures and that ageless croon".