There never were two happier snow people.
4 seconds sound clip from the Frosty's Winter Wonderland movie soundboard.
You can hear this line at 00:12:40.077 in the Blu-ray version of the movie.
Quote context
[...]
- Crystal, I've been waiting all day. What kept you?
- Oh, Frosty, I thought you'd never think of those flowers.
- There never were two happier snow people.
- Hey, everybody, we're going to have a wedding. A wedding!
- Oh, no.
- Oh, Frosty. What's he done to you?
- No more Frosty. No more Frosty. No more Frosty.
[...]