BTS' Jimin Caught Shirtless During Birthday Surprise, RM Shares Photo

K-pop group BTS member Jimin shared a funny behind-the-scenes moment from his birthday celebration with his fellow members.

On Oct. 14, Jimin posted a photo on social media with the caption, "I was almost completely undressed and about to shower when the members came in to celebrate my birthday."

The photo showed a large cake covered in dark brown frosting, with three candles on top.

"The members probably can't post my photo," Jimin added. Since he was barely dressed at the time, he assumed the members would keep the pictures to themselves. Fellow BTS member J-Hope also joined in, leaving a comment that translated to "the laugh of the year."

But Jimin's prediction turned out to be wrong. RM shared a black-and-white photo of the moment on his own social media, writing "happy bday." In the picture, Jimin is seen shirtless, leaning toward the cake to blow out the candles. Jimin later reposted RM's upload on his own account.

BTS returned as a full group in March with the release of its fifth studio album, "ARIRANG." The group is currently on its world tour of the same name and recently performed in South America, including stops in Bogotá, Colombia, and Lima, Peru.