Rihanna's Constant Drinking a Big Problem

Rihanna was hospitalized after the Met’s Costume Institute gala Monday night, supposedly due to dehydration. But sources tell the New York Post the real problem is "excessive partying and not slowing down. She has been traveling nonstop and going wild." She also made some waves before her Saturday Night Live appearance last weekend, skipping dress rehearsal—no musical guest had ever done that before—due to illness, although she did perform on the show.

And, the Post notes, Rihanna has made no secret of her partying: Last week she tweeted pictures of herself dancing with strippers, along with the note, "Best stress reliever= $tripper$." Star reports that she’s on a "party binge," and Radar has this quote from one of the magazine's sources: "Rihanna loves to party but this past month she's gotten really out of control. She's been drinking almost every day and talking about smoking weed a lot, too. Everyone is telling her to slow down and think about therapy, or even rehab." (In what TMZ amusingly refers to as "breaking news," Rihanna has also finally unfollowed Chris Brown on Twitter, and Brown returned the favor.)