Singer Aaron Carter, brother to Backstreet Boy Nick Carter, has entered a rehab facility in Southern California to treat addiction issues. E! News just broke the story that the 23 year old, who as a teen star was at the center of a love triangle between Lindsay Lohan and Hilary Duff, and most recently wowed us on ‘Dancing with the Stars,’ checked himself in earlier this month to “finally get help.” Aaron was working in Orlando on his new album when he decided to check himself in, and older brother Nick has been very supportive and has reportedly visited him throughout his tour.