♦ Mary-Kate Olsen was "acting very oddly" during her stay in Miami for Art Basel. After getting into a fight with Kirsten Dunst at a party at the Delano on Wednesday night, MK—who "looked like she had not brushed her hair in a week"—spent the weekend drinking, chain-smoking, and hanging out with boyfriend Nate Lowman, which means she's probably not pregnant. [P6, P6]
♦ Lindsay Lohan went to a party for Milk without Samantha Ronson last week, where she was spotted nuzzling with Sean Penn. [Fox 411]
♦ Amy Winehouse's husband Blake Fielder-Civil is reportedly threatening to write a tell-all book about Winehouse unless she gives him $1.7 million in the divorce settlement. [NYP]