3D Action Driving Game3.71 / 5.00 4,162 Views
A paranormal curse is killing students at a high school...and you're next.3.58 / 5.00 4,589 Views
Help CrazyDad turn off a pesky neon sign or he’ll go crazy!3.54 / 5.00 7,588 Views
Though if you DON'T plan on submitting it to Newgrounds, I would just suggest googling "song name a cappella". There are dozens of sites out there that have it done for you.
If you really want to do it yourself, I'd suggest watching this video and inverting it so that you have just the vocal and not the instrumental.