After completing a song five times, you will be given five Glee coins, the game's premium currency. This can be done for one song across all four difficulty settings to increase the amount of Glee coins by five. Finish the complete achievement on the same song under all four difficulty settings to get a total fifty Glee coins. Complete the goals that are displayed on the main menu to earn Glee coins to get rare performers. Save 500 Glee coins to spend on a super pack. It will give you ten rare or better performers and a Hall Pass. Ten Hall Passes are required to purchase the guaranteed superstar pack, which gives you a super rare or better performer.