The Prince:
Do I love you because you're beautiful
Or are you beautiful because I love you?
Am I making believe I see in you
A girl to lovely to be really true
Do I want you because you're wonderful
Or are you wonderful because I want you?
Are you the sweet invention of a lovers dream
Or are you really as beautiful as you seem?

Brandy:
Am I making believe I see in you
A man to perfect to be really true
Do I want you because you're wonderful
Or are you wonderful because I want you?
Are you the sweet invention of a lovers dream
Or are you really as wonderful as you seem?

Together:
Are you the sweet invention of a lovers dream
Or are you really as wonderful as you seem?
[ Lyrics from: http://www.lyricsfreak.com/b/brandy/do+i+love+you+because+youre+beautiful_20643111.html ]