Lindsay Lohan -- 'Worried' About Charlie Sheen

Lindsay Lohan believes Charlie Sheen is in the midst of a "life or death situation" ... and has told friends she's "thrilled" that he's checked himself into a rehab center.

Sources close to Lohan tell us ... Lindsay is "worried" about Sheen because his most recent bender shows "obvious signs of addiction" ... something Lindsay knows about all too well.

But after Sheen decided to check himself into a treatment center Friday afternoon, Lohan is confident he can get his life back together ... if he commits himself to sobriety.

We're told Lindsay "understands the problem of having the wrong people around and wants Charlie to understand that he needs to surround himself with positive, sober people."

Credit: TMZ

Lindsay Lohan -- I'm Done Clubbing! (Seriously)

Stop us if you heard this one before -- Lindsay Lohan is telling her friends she is never clubbing again. As in forever. Forever ever. For reals. Stop laughing.

Sources close to LiLo tell TMZ she is "completely over the club scene" -- no more "I'll just have water, thanks" -- and realizes that cutting it out completely is the best chance for her to avoid temptation and remain sober.

We're also told the no clubbing pledge extends to her friends as well -- as in she's going to stop hanging out with the people that only used her to party.

Which pretty much only leaves her trainer and the pizza delivery guy.

Credit: TMZ