That is allowed but you have to make it very clear and show in your video that is what you did because if you don't and I allow it people get mad at me for letting you do it and not them.
Also, I don't want to curate a karaoke contest. There are contests like that already on Steemit and I am more interested in building a community of musicians here. Thanks for understanding.
RE: Steemit Open Mic Week 96 - So Sick (Cover)