OMG! This little guy is our youngest celebrity sibling to date, and definitely one of the cutest! Can you guess which famous crooner calls this towheaded tot his little brother?

While they may not be full-blooded brothers -- they share the same father, but have different mothers -- this little cutie pie's big bro (who is still a youngster himself) is almost like a second dad to him. He might be one of the busiest entertainers on the planet, with millions upon millions of screaming girls to sing to night after night, but he always makes time for his little brother (and his sister, too). And when the famous crooner in question can't spend time with him in private, he just brings his little bro along with him to award shows!

Have you figured out which famous sibling this is yet? Find out which celeb is his big brother by clicking through.