Mischa Barton walks around in Marc by Marc Jacobs flats while helping mobile phone service Boost Mobile host a BBQ on Saturday at Project Beach House in Malibu, Calif.

The 22-year-old former O.C. star was seen grabbing a Hilton Pet Friendly dog bed for her little puppy.

Pete Wentz’s baby’s mama Ashlee was also spotted hanging out in a Boost Mobile Cabana while he deejayed the BBQ.

15+ pictures inside of Mischa Barton getting a BBQ boost… More Here! »

Pete Wentz and his pregnant wife Ashlee Simpson have dinner at La Loggia Italian Bistro in Studio City on Thursday night.

To prepare for Ashlee’s pregnancy, Pete has been doing a little bit of reading.

“I’m reading all the books,” Wentz told OK! recently. “The best one I’ve read so far is “The Expectant Father.” I’m talking to my dad a lot. I’m talking to Ashlee’s dad a lot. We hang out with other people who have kids. You see the world in a different way. It’s exciting.”

“My friends are all really excited for me,” he said. “Andy [Hurley] was the first to respond to anything. Like, I sent out the email for my wedding and Andy responded seven minutes later like ‘I’ll be there and these are the sizes of my clothes.’”

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Ashlee Simpson and husband Pete Wentz spend their July 4th at a friend’s barbeque in Hollywood Hills.

The 23-year-old singer, who toted around the Jimmy Choo “Saba” Leopard Pony Hair Handbag, grabbed a quick bite to eat for lunch the next day at at Chili’s and then made her way to Blockbuster to rent a few DVDs.

The couple has been fueling speculation they are expecting a boy as they have been visiting Los Angeles boutiques and frequently buying blue-colored clothing.

10+ more pics inside of Ashlee Simpson showing off her July 4th curves…
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Ashlee Simpson rocks another headband as she and Pete Wentz visit a friends home in Hollywood Hills on Thursday.

The 29-year old bassist entertained his wife, Ashlee, by doing his version of the taste test with multiple bottles of water. Ashlee got a good laugh out of Pete taking a few sips out of several different brands of water.

Pete recently admitted to kissing guys in the past but maintains he is not gay.

10+ more pics inside of Ashlee Simpson being a hippie hottie…

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Ashlee Simpson (in Juicy Couture) shows off her pearly whites along with her baby bump while heading to California Pizza Kitchen in Los Angeles with her husband Pete Wentz on Tuesday.

The loved up musical pair are expecting their first child this fall with rumors of a baby boy.

The 23-year-old singer was seen with a hippie-inspired headband yesterday, coming from her friend’s house in Beverly Hills.

10+ pictures of Ashlee Simpson’s baby smile… More Here! »

• Pete Wentz wants to end the gay witch hunt
• Whose celebrity tattoo is that?
• Christina Milian takes quick dip
• Kate Hudson gives high fives!
• Looking for some nice frames for your pictures?
• Vanity Fair wants an all-white Hollywood
• A-Rod refuses to answer Madonna questions
• Amy Winehouse likes to jump on top of cars
• Angelina Jolie’s obstetrician, Dr. Michel Sussmann, is watching over her at a French Riviera hospital and called a news conference for later Wednesday afternoon.
• Christie Brinkley and Peter Cook’s bitter divorce proceedings begin today in Long Island, NY, and will be open to the public per her request, which was granted by the judge in the case.
• Lindsay Lohan and Lily Allen have been into the studio together in LA and have reportedly recorded a duet.

Style queen Rihanna sizzles in gold and blue dresses during a taping of MTV’s FNMTV on Wednesday in Hollywood.

Below is FNMTV host Pete Wentz and his pregnant wife Ashlee Simpson, who can be seen hugging Rihanna below.

Rihanna performed her new duet version of “If I Never See Your Face Again” with Adam Levine and the rest of Maroon 5.

10+ pictures inside of Rihanna heating up FNMTV… More Here! »

Newlyweds and parents-to-be Ashlee Simpson and Pete Wentz prepare to depart from LAX airport in Los Angeles on Sunday.

Check out Ashlee’s cute little baby bump!

Pete also has his clothing line Clandestine Industries now available for purchase. To check out about 20 new pieces, visit Nordstrom.com. The hoodies and jackets are actually kinda cute. and affordable too!

10+ pictures inside of Ashlee Simpson’s LAX baby bump… More Here! »