How do I make AI cover

The first step is separating the vocals from the music which can be done at https://vocalremover.org/

Once you have the vocal you can use https://voice-models.com to find a voice model you want, then you can click run and use https://easyaivoice.com to run it.

It might take a few tries to find a model that gives you the quality you want and you might need to change the pitch a few times to find the one that sounds best.

Then its simply a matter is merging the music, new vocals and music video using a video tool like CapCut, Premier Pro, ClipChamp or whatever you know how to use and you are done!