What kind of permission do I need to use a line from an already famous song?

by Veronica
(Massachusetts)

What kind of permission do I need to use a line from an already famous song?

I just finished writing a song in which I used a line from somebody else's song. For example, it goes something like this:

"I'm good at hiding
He'll never find it in me
'cause HE CAN'T READ MY POKER FACE"

Now obviously I didn't use Poker face and this isn't a real song. But that's what I did in my real song, use a line that it's clearly recognizable from another song.

I'm wondering if anybody knows what kind of process I have to go through to copyright my song and sing it without breaking any laws. I used the line as an homage to the artist and to make a point in my song, not to steal anything, so.

Any help will be appreciated.

Thanks!