Singer Aaron Carter, left, and his twin sister, Angel Carter, right, arrive at their birthday party at Shag nightclub in Los Angeles on Friday, Dec. 15, 2006. (AP Photo/Dan Steinberg)

Singer Aaron Carter, left, and his twin sister, Angel Carter, right, arrive at their birthday party at Shag nightclub in Los Angeles on Friday, Dec. 15, 2006. (AP Photo/Dan Steinberg)

Singer Aaron Carter, left, and his twin sister, Angel Carter, right, arrive at their birthday party at Shag nightclub in Los Angeles on Friday, Dec. 15, 2006. (AP Photo/Dan Steinberg)

HOLLYWOOD - AUGUST 16: Singer Aaron Carter, and Nick Carter, arrive at the Howie Dorough of the Backstreet Boys and Promoter Dave Ockun Birthday Celebration party in aid of the Lupas Foundation at LAX nightclub, on August 16, 2006 in Hollywood, California. (Photo by Frazer Harrison/Getty Images) *** Local Caption *** Aaron Carter;Nick Carter