Singer and brother of Backstreet Boys' Nick dies aged 34
He was the younger brother of the Backstreet Boys' Nick Carter.
Website TMZ said Carter was found dead in his bath at his home in Lancaster, California, on Saturday morning. Representatives of his team confirmed his death, PA reported.
"Right now it's a really bad time, we're trying to figure out what happened and what the cause of it was," they said, Qazet.az reports.
"We're just as upset as everyone and hope that fans can give thoughts and prayers to his family."
TMZ also reported Los Angeles County police arrived at the scene at around 11:00 local time (18:00 GMT) after receiving a report of drowning.
Carter started his career opening for the boy band Backstreet Boys on a number of tours and concerts, and also had a successful solo career.
During the late 90s and early noughties he sold millions of copies of his four albums, the first of which was when he was only nine years old.
His second album, Aaron's Party (Come Get It), was released in 2000 and went triple platinum.