I remember him from the early 2000s
He had a brief stint at fame during that time, trying to imitate his brother, Nick, and become a pop singer himself. I think he's the one who sang "I want candy," which is now often used at Halloween for trick-or-treating. A few of his songs showed up in the soundtracks of fun teen films like "Princess Diaries" and "A Cinderella Story." He dated both Lindsay Lohan and Hilary Duff, and the two of them actually fought over this guy! Hilary Duff even wrote a song "Haters" about Lindsay, that's how mad she was over the other girl dating Aaron Carter. Not surprisingly, Aaron had a guest appearance on one of the episodes of "Lizzie McGuire" back in the day.
I kept wondering why he suddenly disappeared, and then read that he got into drugs and his family quietly put him in rehab. Guess it didn't work, based on what happened in the 20 years since then.