RELAPSE FEARS FOR ‘3RD ROCK' KRISTEN AFTER SISTER'S DEATH!

THE untimely death of sitcom actress Kristen Johnston’s alcoholic sister has friends fearing for the star’s sobriety, sources said.

The “3rd Rock from the Sun” cutup, 52, had previously battled addictions to pain pills and booze, and the loss of her younger sibling could push her over the edge, according to sources.

“As a recovering addict, Kristen is still fighting her demons, and a tragedy like this is exactly the sort of triggering event that could end in disaster if she doesn’t stay strong,” an insider said.