Rihanna — Angers ‘Saturday Night Live’ Producers by Missing Dress Rehearsal  —  by Missing Dress Rehearsal  —  EXCLUSIVE  —  Rihanna was a no-show for her final rehearsal for “Saturday Night Live” last night — which did not sit well with the show's producers, including head man Lorne Michaels ... TMZ has learned.

Jack Osbourne and fiancée Lisa introduce precious new arrival Pearl  —  Jack Osbourne has spoken for the first time about becoming a new dad, revealing the “instant love” he felt for his cute baby girl, Pearl, who was born two weeks ago at LA's plush Cedars Sinai hospital.

Lindsay Lohan and Woody Allen — The Manhattan Dinner Mystery  —  LINDSAY LOHAN AND WOODY ALLEN  —  The Manhattan Dinner Mystery  —  EXCLUSIVE  —  Move over Scarlett Johansson ... Woody Allen has a new buxom, young muse in his life ... and that muse is Lindsay Lohan.

Julie Benz Marries in Los Angeles  —  Actress Julie Benz married Rich Orosco on Saturday, her rep confirms to PEOPLE.  —  The couple tied the knot at 6 p.m. at the historic John Sowden house in the Los Feliz neighborhood of Los Angeles.  The wedding featured a Mexican theme …

Beyoncé Does Her Own Makeup - and Cuts Her Own Hair  —  Beyoncé remembers first trying makeup when she was 6 years old.  —  “I was playing in my mother's makeup,” she tells PEOPLE.  “I had blue eye shadow and red lips, and I put crazy blush on.  I looked like a clown, but I thought I was so beautiful.”

Justin Bieber — Meet My Clean-Cut Mentor ... Floyd Mayweather!  —  Meet My Clean-Cut Mentor  —  ... Floyd Mayweather!  —  EXCLUSIVE  —  Justin Bieber's appearance with Floyd Mayweather last night was months in the making — and sources close to The Biebs tell TMZ ... Justin feels his new “mentor” is really just “misunderstood.”

NJ tan mom Patricia Krentcil calls ‘SNL’ impersonation ‘hysterical’  —  Kristen Wiig appeared as Patricia Krentcil on “Saturday Night Live.”  —  The joke was on them.  —  Tanning-obsessed mom Patricia Krentcil toasted “Saturday Night Live” yesterday after the show roasted her — and came up with a terrific punch line.

Jay-Z: Blue Ivy Will Be “the Worst, Spoiled Little Kid Ever”  —  It's not easy being father to one of the most famous, fabulous babies in the world!  —  Jay-Z opened up about first-time fatherhood — to Blue Ivy, his fourth-month-old daughter with wife Beyonce — on Sunday's episode of Oprah's Master Class: Special Edition on OWN.

BREAKING NEWS - GWEN STEFANI'S FINE; AMBULANCE CALL WAS FALSE ALARM  —  X17online can report EXCLUSIVELY, that just an hour ago, Gwen Stefani passed out during an outdoor carnival at her son Kingston's school.  An ambulance was called and EMT's check out Stefani before advising her to go home and rest …

Jake Owen Marries Lacey Buchanan in Sunrise Ceremony  —  Country star Jake Owen and his model girlfriend Lacey Buchanan are officially Mr. and Mrs. Owen.  —  The couple, who met when Buchanan appeared in Owen's music video for “8 Second Ride” and began dating after she starred in the video for his hit …

Alleged Stalker Strikes ... Again  —  EXCLUSIVE DETAILS  —  A homeless man tailed Mila Kunis to a gym Friday — a man who law enforcement says is a stalker — and he was detained after Kunis' security sounded the alarm.  —  Law enforcement tells TMZ, the man is being investigated …

Box Office Shocker: ‘Avengers’ Opens to Record Shattering $200.3 Million  —  The Disney and Marvel Studios tentpole makes history in nabbing the biggest opening of all time in North America; globally “Avengers” has earned a massive $641.8 million in 12 days.

Brian Austin Green Deflects Megan Fox Pregnancy Rumors  —  Brian Austin Green has big plans for his upcoming two-year wedding anniversary with Megan Fox.  They'll be returning to Hawaii where they tied the knot in June 2010.  —  “I think we'll be going back to where we got married.

Adam Yauch Remembered by Madonna, Coldplay  —  Following Friday's death of Adam Yauch from cancer at 47, Madonna says the Beastie Boy rapper, who was also known as MCA, was one of a kind, and that the group was “integral to the musical revolution that was happening at the time,” reports the Associated Press.