Good Song For Friendship?

I have this bestfriend but she is more like a sister. She is posting song lyrics on my facebook wall (parts of a song) and i really want to put one on her wall. The song she put on mine was "Who Dat Girl| by Flo Rida the chrous part. What are some good songs that have lyrics that i could put on her wall to show that she is gorgous and awesome and she will always be my best friend?