First Location, On the spawn area look for the glass container that sits on the table. This can be found next to the gobble gum machine. 

Second Location is on the dressing room, look left and its in the middle of the locker. 

Third Location, on the backstage near the power. Open the door go all the way up and straight all the way to the corner. Last meteor is on the first shelving.    

Note: You will hear a chime if you did it correctly. This can be done in any order and can be played once in every gameplay.