It's SS501's Kim Hyung Joons birthday! Today the singer and actor turns 26 years old, but still looks 19, OMG! Kim Hyung Joon as you know is the maknae (youngest) member of K-pop Idol group SS501 whose leader is Kim Hyun Joong. For non Triple S fans out there here's a fun fact. Because their names are extremely similar, the two have nicknames. Kim Hyun Joong is known simply as "Leader" and the birthday boy is known as "Baby" for being the youngest. So if you've ever read a Kim Hyun Joong post or comment referring to him not by name but simply as "Leader" this is why. Because we love Baby sooo much we want to wish him a happy birthday with a gallery of photos! Happy scrolling!

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Happy Birthday Kim Hyung Joon! SS501 FOREVER! KrisE! @K_Kisses_KrisE