At least half of Lady Gaga's fame can be attributed to her killer piano-playing skills -- ditto for a zillion other big shots throughout the centuries -- and now ... it's time to join the ranks.

The moment has arrived for you to stunt on the world -- and on your friends -- with some new expertise under your belt once you come out of quarantine ... and it's one that could take you places too, if you play your cards right. Yes, we're talking about learning how to play the piano.

Right now, we got an offer on the table we like to call Pianoforall -- a step-by-step online guide that'll show you the ropes on how to jam out Gaga-style ... eventually (gotta practice).

While we can't guarantee the spirit of Beethoven will take you over, we DO promise you'll graduate from being a beginner to an intermediate piano player ... all for just $20. And hey, if Ludwig ain't your thing ... no worries, there are different styles here that run the gamut.

Here's what you get with our deal ... 204 lectures and 10 hours of content where you learn to read music, write, and play by ear -- with lifetime access. A triple threat, no doubt.

The days of playing "Mary Had a Little Lamb" can be retired once you cop this.