I was just going to ask what "ft" meant, but recently saw "feat." in the artist name on some tracks, so I'm guessing that's the same as "ft" and it's short for "featuring".

Yup, they both mean featuring.

Yeah. It comes in various forms.

- featuring
- feat
- ft
- f

...and then sometimes you get a full stop at the end of it

Yes.

Yep

Everyone, stop lying to the OP. We all know "ft" means "foot".