Am I the ONLY girl in the world?

Heard this song the other day and it made me think...
Rihanna "Only Girl"
Want you to make me feel like I'm the only girl in the world Like I'm the only one that you'll ever love Like I'm the only one who knows your heart Only girl in the world... Like I'm the only one that's in command Cuz I'm the only one who understands, like I'm the only one who knows your heart, only one...