Is this wrong for me to do?

So i have a boyfriend and I met my favorite music artist twice. I love him to death and he is my idol. If i meet him again is it fair for me to hug him and kiss him on the cheek? Its a once in a lifetime kind of thing. NO it is NOT Justin Bieber so don't think that is who im talking about. Yes it is possible for me to kiss him on the cheek cause others have before.