Are you stuck on the goal "Perform extensive pirouettes"?
1.Build the sports center.
2.Call a preteen (tween) to the sports center who has a hobby of ballet.
3.Tap on the stereo and click "extensive pirouettes"(this takes 1 day).
4.Wait for a day, or use the time cheat.
5.Go back to the sports center and You completed the goal.
This worked for me
Good luck!