"When I was 21 and I didn't really care, I would go out every weekend and go crazy," Snooki explains. "But now that I have a boyfriend and I'm in love and I'm 24, I only have a couple of glasses of wine once a week."
Ellen can barely believe it: "That's it?!"
We find it hard to wrap our minds around too, Ellen.
Watch the full interview here:
See if the girls are really all grown up on Season 5, premiering Thursday, January 5 at 10 ET/PT on MTV.