Question about using music?

Does anyone know any circumstance where I could use music from a popular song in my animations? Like, can I use a cover of a popular song or can I have one of my characters singing a popular song or can I just use the music without lyrics from a popular song? Or like could I just have her singing the song and making musical sounds like saying the words "dun dun da dun dun da dun every day im husslingggg" or something dumb like that.

I wanted to open up Amy's Big Wish with Amy dancing around her bedroom and singing along to a piece of music but don't want to get hit with some copy write violations or something.

My plan B is to commission a song from someone but I imagine that wont be too cheap... anyway, if you have any ideas or thoughts on this, let me know!