Well, there are a couple of ways. One is to use a plugin called GLS. Just Google it and install it. It's pretty easy to use. The other way is to use Fruity Stereo Shaper. Nevertheless it's not worth it. The outcome is very messy. If you only want the vocal part, I recommend Voclr. It's a website where you can find Isolated Vocals. Anyways if you want to know more just drop ur username and I will contact you.