Aaron Carter posted shots of himself sporting a black eye and bloodied knuckles online over the weekend (23Jun13) and claimed he had been jumped by fans of his brother's former pop rivals during a night out in Boston, Massachusetts.
The I Want Candy hitmaker told Twitter.com followers his martial arts expertise came in handy during the street brawl, revealing he is a "6th degree black belt in Muay Thai" - a boast that came as a surprise to big brother Nick.
He tells Boston radio show Mix104.1, "He is not a black belt in anything. Dancing, maybe. Dance fighting."
And he's not convinced Aaron is being honest with his fans: "We've got, like, a pass in this town... and it's just a little strange the way the whole situation went down. But you know, it's my brother. He's young. I was young one time... I really don't know what happened."