My daughter wanted a Brittany Spears birthday cake and our super market just started this new cake making idea they scan a picture and put it on the cake so I did that I took a picture in and they are doing her cake that way also I am going to hang up all kinds of Brittany Spears posters and going to play her music  I also had my husband make a piñata that is a disco ball.  We have a whole party planed with Brittany Spears stuff and games you could do this with any kids favorite music group or singer.  I am planning a Backstreet Boys party for February for my other daughter so I am sure with a little imagination you could do any one you want.