Hearts Strong as Horses, or Hearts as Strong as Horses, is the first song of season four of My Little Pony Friendship is Magic, featured in the fifth episode Flight to the Finish and sung by all three members of the Cutie Mark Crusaders. This song is used as training montage music while the Crusaders prepare for their flag-waving ceremony routine. It marks the first time Claire Corlett sings as Sweetie Belle. According to Ingram, this song was inspired by a "modern classic from Disney". Lyricist Ed Valentine had "Eye of the Tiger" by Survivor from Rocky III in mind when writing this song.