I think it's playing games, but I have no points either...
I can't even get far considering it never loads for me once I try and do anything in the concert hall... So I shall be intrigued to find out other ways of getting points =)
in order to get points you should play games and the more you earn the more your being a popular or superstar it also make your CDs have experience points mine is a stardom because i always play games and i have 1500 points