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.

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 …

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.

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.

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.”

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.

Amanda Bynes Involved in ANOTHER Hit and Run  —  Involved in ANOTHER  —  Hit and Run  —  EXCLUSIVE  —  The bad news: Amanda Bynes was involved in another hit and run in Hollywood last night.  —  The good news: She didn't hit a cop car this time.  —  Law enforcement sources tell TMZ …

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.

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 …

Chaka Khan — I'm the Next ‘X-Factor’ Judge ... If they Call Me Back  —  I'm the Next ‘X-Factor’  —  Judge, If they Call Me Back  —  EXCLUSIVE  —  Who will be the next judge on “X-Factor”?  Britney Spears ... Demi Lovato ... Miley Cyrus ... Chaka Khan ... er, what?

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 …

ABC's ‘Cougar Town’ Eyes Move To TBS  —  UPDATE SUNDAY: I hear that the deal eyed by both sides is for a two-season pickup by TBS, 15 episodes each, which would allow for Cougar Town to be sold in syndication.  Negotiations are progressing and if they come to fruition, an announcement could come as soon as early next week.

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.