INFINITE's main vocal Woohyun uploads a picture on Twitter from his 21st birthday celebration.

The photo shows Woohyun to have been attacked with a cake by his members.

Netizens responded to his tweet, “Happy birthday I love you!”

INFINITE leader shared, “Happy birthday bubby~! ^^ I will make sure you to get in surprise next year too hehehe.”

Woohyun thanked everyone for wishing him a birthday by tweeting, “I sincerely thank everyone who wished me a happy birthday. I am so happy heehee.”

The boy group is preparing for their upcoming concert ‘The Second Invasion’ taking place on February 11 and 12.