Little did Sarah know, her high school classmate Michael was hiding within the Kristoff outfit.

As Bell explained to the audience, Sarah and Michael have never been on a date before.

Sarah has no idea Michael is asking her to prom.

This could go terribly wrong, but youve got to admit it would make great TV, right?

When the teens arrived back on the late-night show stage, Michael unmasked.

Thats when the actress broke into song, using the melody of Do You Want to Build a Snowman?

to make his promposal happen in front of everyone watching at home.

Do you want to be his prom date and go with Michael to the prom?

Michael wants so much for you to go because if you say no hell have to take his mom.

He knows youre just school buddies, but what the f, he thinks that youre really cute.

Hes asking you to be his prom date in front of millions of people.

If you say no, this will be awkward, Bell continued.

But, thankfully, Sarah said yes.

Watch the romantic ruse in the clip above.