"Thank You Girl"

I transcribed some of "Thank You Girl" yester-day in order to compare it to an-other song (for a different project), and I noticed a small feature in "Thank You Girl" itself.  The line "And eternally I'll always be in love with you" has extra internal rhyme ("eternally" and "be"), and because this sound is sustained, there's almost a sense of the ongoing duration of "eternally."