Knew vs. Know...

I made a bet with my boy Fred....we were leaving the EH && he was singing Say Something - Timbaland ft. Drake. I instantly screamed at him that he was singing the wrong lyrics. We made a bet that if he was right I had to write a paper for him && if I won...um...idt we got that far. lol

My arguement was that Drake used the wrong tense, by saying "was" then saying "know". His arguement was that "knew" and "you" rhymed && that Drake didnt go to college, but he wasnt stupid. lol

I listened to it 3x with my roomie && okayyy I'll admit I was WRONG, but sheesh I cant help it if Aubrey (Drake) has a strong Canadian accent.

"This sh*t was all I know" or "This sh*t was all I knew"?
either way I had a good arguement "knew" and "know" def sound the same
coming from his lips.

PS: IM NOT WRITING YOUR D*MN PAPER .!