If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.
Not to ruin the fun, but this was an a cappella vocal performance that someone with a lot of time on their hands has overlaid with karoake instrumentals for YouTube. There are identical videos with Adele, Taylor Swift, Katy Perry, Justin Bieber (etc.) overlays. ("Mash-up parody" credits at the end of the videos.) Call it what you will, but it's not Ono "covering" anything.
If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.