United Kingdom, Dec. 3 -- Miley Cyrus was "so, so surprised" by Maxx Morando's proposal.

The loved-up couple recently announced their engagement after four years of dating, and Miley has now shared details of Maxx's proposal, revealing that he popped the question during a trip to Japan.

During an appearance on Good Morning America, Miley shared: "I actually had never gone to Japan, which, I did that purposefully. I wanted one place in the world that could be my special place that I saved for me.

"I am not easy to surprise because I love to control every situation, and I had completely surrendered. And I'm telling you, I was so, so surprised."

Miley recently confessed that she's become "more protective" of her love life.

The pop star ...