First Version:
I see the questions in your eyes.
I know what's weighing on your mind.
You can be sure I know, my heart.
Girl I'll stand beside you through the years
You'll only cry those happy tears
And though I make mistakes, I'll never break your heart
I swear by the moon and the stars in the sky
I'll be there
I swear (I swear) like a shadow that's by your side (Keep it down, girl)
I'll be there
For better or worse (better or worse), till death do us part (death do us part)
I'll love you with every black beat of my heart
And I swear. I swear. I s-we-e-e-ear Yeah, I swear. Straight up. What it do?

Second Version: 
Cartman: 
I want to hold you every morning and love you every night, Kyle. I promise you nothing but love and happiness.
I swear by the moon and the stars in the sky 
I'll be there, Kyle
I swear, like a shadow that's by your side
Kyle, swear to God I'll be there.
For better or worse 
Brad Paisley: 
Better or worse, till death do us part, death do us part
Cartman and Brad: 
I'll love you with every [bad word] beat of my heart!