Let It Be is a song by the Beatles, released in March 1970 as a single, and (in an alternate mix) as the title track of their album Let It Be. It was written by Paul McCartney, but credited to him and John Lennon. It was their final single before McCartney announced his departure from the band (by that time, Lennon had already left). Both the Let It Be album and the US single "The Long and Winding Road" were released after McCartney's announced departure from and subsequent break-up of the group in 1970.
Fifth Harmony performed this song as their possible first single, otherwise known as their $5 Million Song, on the finals of The X Factor.