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Mary-Kate Olsen is on the cover of this week’s Star Magazine. The tabloid is claiming that Mary-Kate has been partying really hard since the death of Heath Ledger and her friends are worried that she needs to enter rehab.

They cite her small fall in LA a few weeks ago as evidence of her hard partying. There’s a picture of it on the cover. After that, MK apparently spent a few days in a holistic facility and told Elle that she “talks to people”, but that isn’t enough. Pals want her in a real, credited treatment center.

“Mary-Kate seriously needs to get to rehab, but she doesn’t think she has a problem,” says their source. “She thinks she’s young, hip and entitled to live her life as she sees fit. But it’s affecting everything.”

Star isn’t the first magazine to report this story, and it won’t be the last. Both In Touch Weekly and The National Enquirer ran similar stories a few weeks ago–right after MK’s fall. However, this is the most in-depth look at MK in a tabloid since right after Heath’s death. However, until there’s out and out paparazzi proof (like the kind that seems to come Lindsay Lohan’s way) or a mug shot, I’m taking these reports with a grain of salt.

Photos from a recent party attended by Mary-Kate Olsen and Nicole Richie and Joel Madden have surfaced on the Internet. They show everyone generally having a good time, Mary-Kate smoking and generally goofing around and general debauchery.

I think this was a celebration for MK’s birthday last week, but I can’t really be sure.

I don’t think the photos are overly incriminating–they show normal twenty-somethings doing stuff most twenty-somethings would do at a party–but I think it will be embarrassing for all parties involved that these photos are now in the media.

See the photos here.

What do you think of all this? Is Mary-Kate having some harmless fun? Or is she clearly partying too hard?