For those who don't get it, she was responding to this:
Alex Goldschmidt @alexandergold 15h15 hours ago
I pride myself on still thinking love can be like a romantic comedy but sometimes I just think I'm behind and just won't catch up.
Taylor Swift @taylorswift13 14h14 hours ago
@alexandergold Go read Gaga's tweet that she sent me a few months ago. It's good love luck.
Because it's not a tweet.
It's a magical spell.