The rumours have been proven true. The Frozen Fever party will be held on Club Penguin in late April. Don't be confused with the party that was held in 2014. It was confirmed on the Club Penguin Blog, followed by a picture of what costumes we will wear!
From the blog:
If you're a paid member, during the party you'll also be able to adopt the rare Snowman Puffle, inspired by Olaf from Frozen.
To everyone who missed out on the Frozen Party last year — welcome! This party's for you!