B2ST's vocalist Yoseob is celebrating his 23rd birthday! On January 5th, Yoseob amused fans by congratulating himself on his own birthday."Yoseob, happy birthday," he tweeted to himself. Hilariously, Yoseob then replied to his own tweet.�"Thank you, Yoseob ?? sob sob." Kikwang tweeted, "Today is our Yoseb Yoseb Yoseb's birthday. Please congratulate him. Congratulations, our Yoseb!" Junhyung added, "Yoseob, happy birthday ?? I love you." Dongwoon and Hyunseung respectively wrote, "Yoseob hyung, happy birthday, going to see you soon!" and "Yang Yo Yang Yo Yang Yo, wishing you a seriously happy birthday, can't stop you nowwwwwwww." Other stars like Supreme Team's Simon D, F.T. Island's Hongki, Huh Gak, G.NA, and Shinsadong Tiger sent him their birthday wishes. Fans replied, "Happy birthday, Yoseob," "We hope you spend a happy time with your members," and "Eat delicious things and gain weight"! Source: Yoseob's Official Twitter