"Hey, Stella!"
Context
This iconic line is shouted, multiple times, by Stanley Kowalski, played by Marlon Brando, in A Streetcar Named Desire (directed by Elia Kazan, 1951). Kowalski's character says it in the original play, too.
Back when Marlon Brando was hot, he played hot-blooded Stanley Kowalski in A Streetcar Named Desire. Stanley isn't subtle. So when he wants Stella back, what does he do?
Write her a nice note? Apologize? No, he stands in the street, screaming like a madman—"HEY, STELLA!"
Why does she take him back? This is why.
Where you've heard it
You've heard it if you've ever met someone named Stella, you're reminiscing about when Marlon Brando was good looking, or you're a crazy abusive drunk trying to win back a loved one.