Ivanka Trump gave birth to a baby girl Sunday morning, and she's already announced the little one's name!

Actually, Ivanka's dad Donald Trump told Fox & Friends the baby's name before his daughter could reveal it. "I just left the hospital and the baby is beautiful," said Trump, 65. "[Ivanka's] doing great. Arabella Rose is the baby's name."

Always in the spotlight, Donald!

But Ivanka did take to Twitter to tell the world on her own how "great'' she's doing. "Jared and I are having so much fun playing with our daughter!" the 29-year-old wrote. "Arabella Rose is beyond adorable. She's truly a blessing."

Congrats!

Future boyfriends/girlfriends beware: Liam McDermott is one protective big brother!

Any dates his siblings bring home better be ready to meet Liam. The little guy, 4, is already showing off a tough guy attitude ... though he's got his gentle side, too.

Pregnant Tori Spelling and hubby Dean McDermott took kids Liam and Stella to an LA park over the weekend, where Liam was super sweet as he felt his momma's pregnant tummy. But, the little tyke also showed off a tough side with a mohawk and a face full of attitude!

Spelling announced her pregnancy in April.

Tori and Dean star in a new Funny or Die video in which Tori parodies the show Hoarders ... and what she hoards will surprise you ... and crack you up. Watch the vid after the jump!

Justin Bieber and girlfriend Selena Gomez are officially young wedding crashers. The twosome happened to be having dinner in Malibu when they reportedly heard Justin's song being played at a reception.

That's when Biebs and his ladylove popped in to say hello. No doubt, the girls at the wedding enjoyed taking plenty of photos with the 17-year-old teen sensation.

Along with the above video, one of the bride's family members posted:

"Last night at my cousin Jeanine's wedding reception, out of nowhere, Justin Bieber shows up while one of his songs was being karaoked by one of the wedding guests."

Find out which song was being played at the time ... after the jump.

John Mayer dined with pals at fav celeb spot Tavern in Brentwood Sunday night. And with that T-shirt and long hair ... he was literally and figuratively one big target.

Of course, Mayer doesn't help himself. At a recent concert at Berklee College, he told the audience that he had quit Twitter. "I was a Twitterholic," the singer said. "I had four million Twitter followers and I was always writing on it ... and it started to make my mind smaller and smaller and smaller and I couldn't write a song anymore."

Twitter! The incredible, brain-shrinking website! Alert the scientific journals! Thank you, Dr. Mayer.

At Tavern, our photogs asked Mayer about the Twittincident. Watch his response below.

Patrick Schwarzenegger enjoyed some time with the boys out in Malibu over the weekend ... going shirtless and soaking in the sun!

Even though Arnold Schwarzenegger and Maria Shriver are going through a very public divorce, their 17-year-old son seems to be handling things pretty well. Aside from trips to the beach, Patrick has also been staying busy with his security job at The Grove in LA.

After seeing these photos of Pat showing off his sculpted physique, we have a feeling the young ladies will be going in for the attack.

Patrick's mom, Maria, was also taking a stroll in the sand ... check out our exclusive video below, and see more of Patrick and his buds after the jump!

Demi Lovato, who released her new song "Skyscraper" just last week, is more than ready to get back into the spotlight.

While hitting up The Grove in LA to catch an 8:30 p.m. showing of Horrible Bosses, Ms. Lovato was all smiles wearing a black shirt from soberisexy.com that read, "The Only Coke I Do Is Diet." Loves it!

Great to see that despite her recent rehab stint for an eating disorder, she still has a great sense of humor. Read what Demi Tweeted about her run-in with the paparazzi outside of the movie theater ... after the jump.

David Beckham took his oldest son Brooklyn out for a surf session Sunday in Malibu, and the doting dad even snapped some shots of his boy getting his wave on!

Meanwhile, the younger boys, Cruz and Romeo, watched from the beach and mom Victoria and new sis Harper stayed indoors resting.

The family is renting a huge home right on the sand in Malibu. All the boys have taken advantage of their beachside abode by taking private surf lessons. Seems Cruz, 6 1/2, didn't exactly enjoy the strong waves as he swallowed a little water during one class.

But all was well when the fam enjoyed some post-surf ice cream!

Ivanka Trump and hubby Jared Kushner are the proud parents of a baby girl. Donald Trump's daughter Tweeted the big news:

"... @jaredkushner and I welcomed a beautiful and healthy little baby girl into the world. We feel incredibly grateful & blessed. Thank you all for your support and well wishes!"

Donald is now the grandfather to three grandchildren. In addition to Ivanka's little girl, Donald Trump Jr. has two children ... and another on the way.

Jared and Ivanka have yet to announce the little girl's name. Read what the new mommy had Tweeted just before giving birth ... after the jump.