Stepping out for a birthday BBQ, Jennifer Aniston was one of the many celebrity guests dropping by Sacha Baron Cohen’s Hollywood Hills estate on Sunday afternoon (October 19).

Sacha and his actress wife Isla Fisher threw the shindig in celebration of their daughter Olive’s all-important first birthday.

Following an evening out in celebration of Zac Efron’s 21sty birthday, Disney co-star couple Ashley Tisdale and Jared Murillo were spotted out shopping in Los Angeles on Sunday (October 19).

Showing off her recently-dyed brunette locks, the 23-year-old Sharpay Evans actress and her “High School Musical” beau checked out the offerings at the Macy’s Department store.

Enjoying a sunny October afternoon in Los Angeles, Hayden Panettiere and Milo Ventimiglia were spotted out ong shopping trip to Jenni Kayne.

After combing the store’s racks, the “Heroes” co-star couple emerged from the popular shop[ping stop separately so they wouldn’t be photographed together.

Earning major brownie points, Justin Gaston was spotted joining the Cyrus family ladies at a morning church service in Los Angeles on Sunday (October 19).

While Miley stayed at home because she was sick, the “Nashville Star” stud headed off with her mother Tish, younger sister Noah and her friend, as well as grandma - with five venturing about in the family SUV.

>

Looking gorgeous in green, Selena Gomez was spotted as she headed out with her mother Mandy to catch the premiere of “Tinker Bell” at El Capitan Theater in Los Angeles on Sunday (October 19).

The animated film is directed by Bradley Raymond, telling the story of the real fairy in J.M. Barrie’s play and subsequent novel “Peter and Wendy.”

The stars of Hollywood were out in full force at the Greek Theatre in Los Angeles for Spike TV’s Scream Awards on Saturday night (October 18).

In its third year, the “Scream Awards” honor the best in fantasy, sci-fi, comics and horror, with this year’s show featuring appearances by celebrities including Kate Beckinsale, Kristen Bell, Rosario Dawson, Milla Jovovich, Stan Lee, the Osbournes, AnnaLynne McCord, Seth Rogen, Winona Ryder, and Liv Tyler, among many others.

Letting her hubby Tom Cruise take care of daughter Suri while she concentrates on her work, Katie Holmes was spotted leaving her East Village apartment in Manhattan, New York on Sunday afternoon (October 19).

The “Mad Money"actress was spotted making her way around the Big Apple following a nighttime performance of “All My Sons” alongside co-stars John Lithgow and Diane West the previous evening.

Taking to the Land Down Under for a red carpet walk, Pink was spotted stirring up the crowd by signing autographs and posing for photos with fans at the ARIA music awards in Sydney, Australia on Sunday (October 19).

With bright colored ensembles surrounding her, Pink happened to be one of the few stars to wear white, donning a long, flowing maxi dress with jewels in her hair.

Stepping out side-by-side, Mandy Moore and Adam “DJ AM” Goldstein were in attendance at Friendly House’s 19th Annual Awards Luncheon on Saturday night (October 18).

Held at The Beverly Hilton Hotel, the former couple were seated next to one another, joining a guest list including Candy Spelling, Paige Adams Geller and Katey Sagal.

Showing her school support, Dakota Fanning kept busy on Saturday (October 18) cheering on her Vikings at The Campbell Hall Episcopal in Studio City.

A member of the high school football team’s cheerleading squad, the young actress was held high by her teammates, displaying her actobatic skills for the school supporters during the game.

Accompanied by her canine companion Daisy, Jessica Simpson attended the launch of her new fragrance “Fancy” at Dillard’s in Dallas, Texas on Saturday (October 18).

The “Do You Know” singer has teamed with Dior vet Alexis Dadier to create what’s described as a sugary fragrance with ingredients including “pear, apricot nectar, toasted almonds and caramel, plus a flowery dash of gardenia and jasmine.”

Fresh off of the big Los Angeles premiere of “High School Musical 3: Senior Year,” Zac Efron and friends headed out in Hollywood to ring in his 21st birthday on Saturday night (October 18).

Starting off at Pace nightclub, fellow partygoers included Zac’s co-star girlfriend, Vanessa Hudgens, along with pals Monique Coleman, Ashley Tisdale, Jared Murillo, Brittany Snow, Amanda Bynes, Aly and AJ Michalka and Michelle Trachtenberg.

Doing her best to elude trailing paparazzi, Mary Kate Olsen made her way out with a friend for some afternoon furniture shopping at the Open Door in West Hollywood on Monday (October 20).

After finishing up inside the shop, the Olsen twin headed out and hopped into her pal’s car while covering her face, with her friend then reportedly getting into a minor non-injury car accident by backing into an El Pollo Loco delivery person!

Recently returned back to the States following a 5-day trip to Paris, France, Gisele Bundchen was hard at work in Santa Monica on Monday (October 20).

The Brazilian supermodel took to the beach, working with stylists before posing alongside a hunky shirtless model for a photo session.

Ready for the promotional homestretch before Friday’s release of “High School Musical 3,” Zac Efron, Vanessa Hudgens and Ashley Tisdale all were spotted arriving to their New York City hotel on Monday evening (October 20).

Rushed by fans and paparazzi as they tried to make their way to the entrance, the Disney stars all are scheduled for TV appearances in the Big Apple over the next few days.

Taking her cues from Michael Jackson by covering up with a big umbrella, Britney Spears was spotted picking up her kids, Jayden James and Sean Preston, from their school in The Valley on Monday (October 20).

Accompanied by her father, Jamie Spears, the “Womanizer” singer ducked into the building without letting her face be seen, then letting her dad go outside to round up the boys.

Hard at work on their ABC drama, Kate Walsh and Tim Daly were spotted out for a day of filming for “Private Practice” in Santa Monica on Monday (October 20).

After arriving on set, Miss Walsh sipped on a coffee and chatted with her helpers before changing into a pair of heels and starting her day in front of the cameras.

Venturing out on a sunny October afternoon, Jennifer Aniston was spotted paying a visit to her mother’s house in West Hollywood on Tuesday (October 21).

The trip out comes amidst rumors claiming that the former “Friends” actress is pregnant with on/off boyfriend John Mayer’s baby - all of which sprung from an Aussie tabloid report earlier this week.

Stepping out for another night on Broadway, Katie Holmes hopped out of her chauffeured ride and headed into the Gerald Schoenfeld theatre to perform at Arthur Miller’s “All My Sons” on Tuesday night (October 21).

Meanwhile, the “Pieces of April” actress said her goodbyes to hubby Tom Cruise and daughter Suri, as the two were spotted leaving their Manhattan apartment and heading to the heliport on the East side of New York City earlier in the day.

Stepping out for a little fresh air and some girl talk, Gisele Bundchen was spotted out for a stroll with a gal pal in Brentwood, California on Tuesday (October 21).

The Brazilian supermodel showed off her long, sexy legs in a pair of tiny jean shorts matched with an olive 3/4-length sleeve top with sandals.

Glamming up the Leicester Square red carpet in a black L’Wren dress, Penelope Cruz stepped out for the BFI London Film Festival screening of “Vicky Cristina Barcelona” on Tuesday (October 21).

The movie, which also stars Scarlett Johansson and Rebecca Hall, is told to be the tale of “tangled love lives of Americans abroad in Barcelona.”

Taking to the TRL studios, “High School Musical 3” stars Zac Efron, Vanessa Hudgens, Ashley Tisdale, Corbin Bleu and Monique Coleman all turned up for a taping of the popular MTV show to promote their new movie.

During the course of their time on-satge, Zanessa stepped up arm-in-arm, proceeding to dance the classic waltz together with TRL co-host Lyndsey Rodrigues joking, “Good practice for the wedding!”

Taking care of priority number one - their daughter - Ben Affleck and Jennifer Garner were spotted escorting young Violet to school in Santa Monica on Tuesday (October 21).

Later on in the day, the expecting “Juno” actress was spotted out once again, this time acting hiding her face and baby bump with bags as she picked Violet up from school.

Sporting a “The One I Love” t-shirt with jeans, Britney Spears was spotted making her way over to a dance studio in Hollywood on Tuesday (October 21).

The sighting comes just after a mistrial was declared in the “Gimme More” singer’s misdemeanor case for driving without a California license, as the jury was deadlocked 10-2 in favor of the singer’s innocence, reports tell.

Rumored to be the new boyfriend of soon-to-be 16-year-old Miley Cyrus, Justin Gaston was spotted showing off his wild side during a private party in Hollywood Hills.

The underwear model/singer has almost become part of the “Cyrus Family,” spending most of his nights at Billy Ray’s house (even when Miley’s not there).