"LazyTown's Surprise Santa" is an episode in the first season of LazyTown.
"Robbie Rotten finds out that the LazyTowners are having a Christmas party, but believes he wasn't invited. He sets out to ruin the party by shooting a snowball out of a cannon at the guests. However, he soon realises that he was invited. Sportacus saves the day before the snowball crashes into the festivities."