Rihanna & Chris Reunite, Katie's Detox Diet

• It seems Rihanna and Chris Brown have reunited: The two have been holed up at Diddy's Star Island mansion since late last week and are now "focusing on a reconciliation." Not surprisingly, fans have been a little bit dismayed by the news. [NYDN, People, Reuters]
• Why didn't Katie Holmes walk the red carpet at the Oscars? She's on an "intense detox diet" that has left her "lethargic," poor thing. [NYDN]
• Sumner Redstone is reportedly dating a former flight attendant who is six decades his junior. [R&M]

• Jeremy Piven's decision to walk away from Speed-the-Plow may still come back to bite him: The show's producers now say they plan to go to arbitration to settle the dispute. [P6, E!]
• Is CNN legal analyst Jeffrey Toobin having an affair with Casey Greenfield, the daughter of CBS political pundit Jeff Greenfield? [R&M]
• Amy Winehouse has returned to the UK following an extended vacation to St. Lucia. Blake Fielder-Civil, her estranged husband, now says he plans to leave the UK so he can escape Amy's "destructive influence." [People, Sun]
• Topper and Tinsley Mortimer are "doing their best to prove to everyone that they're still together." [P6]
Marie Claire editors supposedly told their Running in Heels interns they could only eat "carrot and celery sticks" from the Hearst cafeteria. [P6]
• Madonna took the kids and Jesus Luz to the Kabbalah Center this weekend. [Us]
• Bruce Willis is being sued for allegedly walking off the set of a movie he agreed to direct. [TMZ]
• Ed McMahon is in intensive care with pneumonia and bone cancer. [CBS]
• Gordon Ramsay was never a soccer star back at home, in case you were wondering. [P6]
• Ticket sales aren't going well for Britney Spears's comeback tour. [MSNBC]