Lyrics:

If i were you i would watch out...for that guy...over there.
He is, he is, he is, he is, not that fair!

Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?

Have you checked out the wardrobe?
The basement? Yeah the cellar,
On the way to school.

How can you be so sure he loves you?
Yeah!

Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?

Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?
Is your sister in love?

Is your s-s-s-s-sister in love?