Madonna & A-Rod's Tryst at Casa Seinfeld

Madonna and Alex Rodriguez were able to fly out to the Hamptons for a "quick and cozy rendezvous" without anyone knowing, but only because Jerry and Jessica Seinfeld picked the couple up (separately) from the East Hampton airport and let them hang out for several hours at their waterfront manse. [P6, The Sun]
With her husband Rossano Rubicondi filming a reality show in Italy, Ivana Trump has been hanging out with a 23-year-old Belgian model named Marius Rusovici. [P6]
Tina Brown and Cathie Black are enemies, apparently, since they "disagreed on just about everything" and "wouldn't even look at each other," at a conference this week. [R&M]
Is John McCain making an Saturday Night Live appearance this weekend? Does anyone care? [MSNBC]

Jennifer Aniston is mad at Pink for suggesting John Mayer only sleeps with stupid women, and now she's "ordered her friends not to speak to the singer." [Showbiz Spy]
Ann Dexter-Jones says she's worried that all the media attention makes it harder for Lindsay Lohan and Samantha Ronson to have a normal relationship. You think? [OK!]
An LA judge has upheld a previous ruling against Jennifer Lopez's ex, Ojani Noa, for breaking a confidentiality agreement by writing a tell-all book about her. [E!]
Justin Long and Kirsten Dunst haven't split up, they're just "dating in secret." Okay! [Star via NYDN]
Mariah Carey "clearly wasn't into" Nick Cannon's performance as a DJ at the Whitney last week, which means their relationship might be on the rocks. [OK!]
Michael Bloomberg, Betsy Gotbaum, and Art Garfunkel all get their hair done at the same salon, in case you care. [P6]
Brooke Shields is supposedly considering adopting a new baby. [Daily Express]
Michael Jackson says any talk of a Jackson 5 reunion tour is false. [People]
What a bummer: That sitcom starring Britney Spears, Paris Hilton, and Lindsay Lohan is definitely not happening. [MSNBC]
Sienna Miller's privacy lawsuit against a UK photo agency got underway yesterday. [E!]
Donald Trump claims he tried mailing a $1,000 to a homeless man in Vancouver, but the guy couldn't cash it because it was made out to the wrong name. [P6]
Breaking news: Heidi Montag's sister Holly is moving into Lauren Conrad's guest house. [Star via NYDN]
Model Niki Taylor and her husband Burney Lamar are expecting their first baby. [OK!]