The following is what I think is ideal:

(1) If you can get in touch with a famous star, you can send him a signed photo, a signed genuine jersey, a signed football, signed sneakers and so on.

(2) Give her two XX tickets for her birthday, go to the ball game in the evening, and then you will know. ...

(3) Make the cake into the name or shape of his favorite star.

(4) unsigned football or jerseys are also good, especially genuine jerseys. Don't give them to your sworn enemies.