There are actually Twelve Fruits of the Holy Ghost. The "True Love" one hears in the song is not a smitten boy or girlfriend but Jesus Christ, because truly Love was born on Christmas Day.

Daily Verse Reflection Commentary on Psalm 105:1-7 (Read Psalm 105:1-7) Our devotion is here stirred up, that we may stir up ourselves to praise God. Seek his strength; that is, his grace; the ...