Grizzy & the Lemmings (2016)

S01E31 Happy Birthday Lemming

The Lemmings decide to host a birthday celebration, and when the cheerful "Happy Birthday" song fills the air, it disturbs Grizzy, who has just settled down for a nap following a big meal. Determined to put an end to the ruckus, Grizzy sets out to silence the party, but the Lemmings are determined to keep the festivities alive.