Universal Pictures

Bell also gave us an update on the Frozen sequel. She said the script "is just being finished written and I think we start recording next month."

Too exciting!

"I have a couple of clues as to what's going to happen," Bell teased.

As for another hit like "Let It Go," Bell said, "Nothing should top that. Even when I hear it, hearing it as many times, as I have, every time I hear it, it gives me the tingles.

"It's a brilliantly written song and it's so perfectly suited for her," she continued. "I think there's going to be a lot of great songs in the next movie but I don't know if any of them will top 'Let It Go.'"

Bell recently reunited with her Frozen costars Idina Menzel and Josh Gad in New York City for a fundraiser for Menzel's A BroaderWay. "She asked Josh and I if we'd come and do a sing-a-long and it was so much fun!" Bell beamed. "There were a couple hundred kids there, we sang songs from the movie, some that were cut that no one ever heard before, and it's just such a nice time to see your friends and it's really fun to sing. It's really, really fun to sing especially alongside of people that you love."