If you are building a website for a musical performing artist or anything to do with music, consider learning more about music. There is a very good video series on YouTube called How Music Works with Howard Goodall. Episode one is on melody. It is a documentary.
If you play a particular instrument, such as a bass guitar, you can look at all kinds of instructional videos on YouTube and other sources. Go to YouTube and search for “bass cover” (or “guitar cover” etc) and then type the name of the song you want to see, or put “bass cover” at the end of your song request. You can watch the musician playing the song on the bass while the song plays at a low volume in the background.
If you like rock and roll and wonder which cover songs are popular, go here to see the 12 most requested rock and roll songs.