Anyone is fine or you can use the instrumentals from kareokee apps etc i dont know many but there is smule etc. it can also be acapella. However way you want it. Look at the current entries on #untalented-singsong
Shades are allowed too. Let's create legacies for keeps. Participate in the contest. Would love to see!
Take some imaginary @teardrops (smart media tokens). You can read about these special tokens Here!!!