Who knew that heavy metal influences would go so well with a magical girl anime?
And lo, I looked upon episode 25 of Heartcatch Pretty Cure, and in the second ED, they didst make a gospel song! And lo, it was called Song of Tomorrow, and it was awesome! Hallelujah!
On the non-Leitmotif end of things, there's also Pretty Cure no Shimei wo Mune ni, which pulls double duty as Cure Beat's unofficial theme song during her first few appearances.