If you don’t know that Lady Gaga’s engaged to longtime love Taylor Kinney by now, well, now you do! The singer revealed the very happy news to her followers on Instagram on Valentine’s Day—even more fitting because Taylor gave Mother Monster—what else—a massive, heart-shaped diamond. Zaven Ghanimian, CEO of Simon G. Jewelry, said, “Lady Gaga’s center stone is a heart-shaped diamond, approximately 6 carats. I would estimate at least S1 Clarity or better, G clarity or better.