Red Velvet celebrated Irene’s birthday with a sweet surprise!

On March 29, the group posted a cute video on Instagram of their tiny birthday bash for their beloved leader. The clip shows Irene opening her door and looking surprised to find her members waiting for her with a birthday cake.

The video also shows the Red Velvet members filming Irene with their phones as they loudly serenade her for her special day.

Watch the adorable clip below!

Happy Birthday to Irene!