Exclusive: Katy Perry, John Mayer Split for Second Time  —  Katy Perry and John Mayer have once again said goodbye — for now.  The pop songstress, 28, and singer-songwriter, 35, have split for the second time, multiple sources confirm to Us Weekly.  The high-profile pair began casually …

Jon Hamm's revealing performances puts ‘Mad Men’ in a tight spot  —  Gerard Butler won't let Ashley Judd leave the ‘Olympus’ party'; Kim Kardashian is played up big on In Touch mag's cover.  —  Jon Hamm is fully equipped for stardom, say ‘Mad Men’ insiders.  —  “Mad Men” star Jon Hamm's private parts are causing a stir.

Exclusive: Alexis Bledel, Vincent Kartheiser Engaged!  Mad Men Costars to Marry  —  Their Mad Men characters had an ill-fated affair, but off-camera, Alexis Bledel and Vincent Kartheiser are excitedly celebrating their engagement, Bledel's rep confirms exclusively to Us Weekly.

‘Teen Mom’ Star Farrah Abraham — Arrested for DUI  —  ‘TEEN MOM’ STAR  —  Farrah Abraham  —  Popped for DUI  —  EXCLUSIVE  —  And the “Single Mother of the Year” award goes to ... “Teen Mom” star Farrah Abraham, who was busted for DUI Monday night in Nebraska ... TMZ has learned.

EXCLUSIVE FIRST BABY PHOTOS: Meet Holly Madison's Daughter, Rainbow  —  Holly Madison opened her home to ‘In Touch’ to reveal the first ever baby photos of her daughter, Rainbow.  —  Just seven days after Holly Madison gave birth to her first baby, the former Playmate opens her home to In Touch …

Lindsay Lohan's New Mug Shot — If Looks Could Kill  —  LINDSAY LOHAN  —  NEW MUG SHOT  —  If Looks Could Kill  —  EXCLUSIVE  —  Lindsay Lohan has just been booked by the Santa Monica police ... which means ... SHE HAS A BRAND NEW MUG SHOT ... and she does not look happy about it.

Rapper Too Short — Arrested for DUI  —  Arrested for DUI  —  EXCLUSIVE  —  Rapper Too Short has just been arrested for DUI ... after allegedly attempting to run from police, TMZ has learned.  —  Law enforcement sources tell TMZ, Short — real name Todd Anthony Shaw …

Miley Cyrus Puts Her Engagement Ring Back On  —  Sending us a message Miss Miley?!  —  Miley Cyrus took to her Twitter yesterday to show off her goofy onezie outfit, but we think she was actually posting a pic so that her 11.5 million followers could see she's wearing her engagement ring again!

Baby on board: Pregnant Kate creases up with laughter after being handed badge on Tube as she joins Queen and Prince Philip for 150th anniversary celebrations  —  She is unlikely to swap her chauffeur-driven car for the normal morning commute.  —  But just in case, the pregnant Duchess …

Kate's Latest Accessory: ‘Baby on Board!’  Button  —  The Duchess of Cambridge received an appropriate memento of her trip to a London tube station Wednesday - a “Baby on board!” button.  —  “I'll make sure I wear this at home,” Kate, laughing, said as she was handed the badge, emblazoned with the London Underground logo.

Lindsey Vonn mocked Tiger Woods during cheating scandal  —  Vonn, who just announced she's dating Woods, made light of the star's claim to a sex addiction in an old Time Magazine article.  —  Vonn once joked that she'd like to do a “Saturday Night Live” skit mocking the golf superstar's announcement that he had a sex problem.

Matt Damon, George Clooney & Stacy Keibler Dine in Berlin  —  Three's company!  —  George Clooney and Stacy Keibler had dinner with Matt Damon in Berlin on Saturday.  —  The trio dined at Grill Royal, a hot spot for celebrities in the area, where it looked like Clooney, 51, and Keibler …