Elle King has got that engagement glow at the GRAMMYs!

On Feb. 7, King's longtime boyfriend, Fergie, popped the question on a sailboat while underneath the Golden Gate Bridge. So when ETonline caught up with the "Ex's & Oh's" singer on the red carpet of music's biggest night on Monday, get got all the details on that super romantic moment.

"I thought if I ever got engaged it would be like, 'I dare you to marry me in some dumpster' or whatever," the 26-year-old singer said. "But like [on a] sailboat under the Golden Gate Bridge? It's beautiful!"

King confessed that the engagement was a sweet and unexpected pre-Valentine's Day surprise. "Well, the morning of he was like, 'I've got to go out and get something' and I was like, 'What are you going to get?' and I was like, 'Oh my god, is he going to propose today?!'"

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The blonde beauty, who looked sultry in a black lace gown, continued, "And he comes back with a brown paper bag and, I was like, 'No, he's not,' and so I was surprised and it was beautiful and our whole family is so happy for us, so it's beautiful."

And King is already starting to make plans for the big day! When asked what type of bride she wants to be, the singer's answer was hilariously blunt: "A drunk one."

As for their future family, King believes the more, the merrier. "I want like 19 kids!" she said with a laugh. "I want a family band, I want an orchestra. We both want a family, so I'll finish this cycle of our record and hopefully start my youngings."