If you sing a cover song and change something about the track (whether it be lyrics, timing, key), your cover has now become a derivative work. Think of it as deriving from another piece of music and, therefore, become something new. You will ALWAYS need permission to do these.
Press Kit Strategies for Singers & Musicians
The main goal in creating a press kit is to generate interest in an artist and the music they play. A press kit includes background information, photos, samples of music, a listing of past and future gigs you have scheduled, and any other pertinent information.
