Ceremony Singer or Music Cost?

Does anyone know how much does it cost for ahalf hour of piano or ceremony music?

I'm thinking of suprising my FH with live ceremony music an a singer to perform one song.

Don't know if it's worth it just to do that?

I have a friend who is an AMAZING singer. he plays guitar too! He is singing at my wedding...

Maybe he would sing at yours? I don't think he has ever sung for money before... he has done open mikes and stuff like that...