Former Backstreet Boy Nick Carter’s 25-year-old sister Leslie died last night in what is believed to have been an accidental overdose of prescription medication. TMZ says:

The 25-year-old sister of Nick Carter had recently moved from Canada to Upstate New York to live with family members while she attempted to kick her addiction.

Family members had attempted to rid the home of any prescription medication — including Xanax — and were hopeful Leslie was on the road to recovery.

Sources say family members believed Leslie would be OK to stay alone in the home for roughly an hour yesterday while they ran errands … but when they returned, Leslie was unconscious.

Officials were called to the scene … but Leslie could not be saved.

We’re told Leslie’s 1-year-old daughter was not at home with Carter at the time of her death.

The cracked-out apple sure doesn’t fall far from the fucked-up tree, does it? This is why alcoholic stage mothers should just be spayed. Otherwise you wind up with kids that are more like feral cats than people.

Guess/Victoria’s Secret model Kate Upton for Deep Blue swimwear, because she doesn’t haven a meth-carved exoskeleton: