“It almost didn’t make it in.

But then we were like, ‘What are you talking about?

That’s not what it means.

Kristen Bell

Kristen Bell.Amy Sussman/WireImage

Don’t be a perv.'”

Kristen Bellis looking back at aFrozenjoke that’s… absolutely nuts.

“‘Why have a ballroom with no balls?'”

Frozen, Anna, Kristen Bell

Kristen Bell’s Anna from ‘Frozen’.Disney

she sang along while watching a clip of the movie in a newinterview withVanity Fair.

“How did we get that joke in there?”

Bell then asked incredulously.

We slid it under the radar."

“It almost didn’t make it in,” she said.

“But then we were like, ‘What are you talking about?

That’s not what it means.

Don’t be a perv.'”

“I said, ‘All the Disney princesses stand like this.

Their hands are always perfect, their posture’s perfect.

I want her to be the opposite.

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Bell said she was allowed to improvise certain elements of Anna.

“Thankfully this whole experience was really collaborative,” she said.

Can you add some drool?

Can I make this very realistic and kind of dorky?’

Disney

Despite the beloved film’s popularity, Bell’s children remain unfazed byFrozen.

Even if they secretly liked it a lot, they would never tell me.”

Watch the full interview with Bell above.