What better way to celebrate Mother's Day then with a posh party in Brentwood?

The pregnant American Reunion star came to the party bearing a big box of fruit, but she looks very ripe herself!

Hannigan is due to give birth this summer, and shared via Twitter this week, "I could be doing the math wrong but I think I'm in my 5th trimester."

We think so too, Alyson!

Is Ginnifer Goodwin bored of her new beau already?

The Something Borrowed star appeared to be completely entranced by her cell phone, as she strolled though NYC with her man Josh Dallas, on Saturday afternoon.

While she usually makes stylish fashion choices, the 33-year-old actress looked frumpy in a flowered jumpsuit, black cardigan and a bright orange purse, while her man showed off his protruding pecs in a tight grey shirt.

Goodwin and Dallas got a bit of good news earlier this week, when it was announced that their ABC fantasy drama Once Upon A Time was renewed for a second season.

Congrats you two!

It's a very special week for January Jones and her darling 8-month-old son Xander, because this is the actress's very first Mother's Day!

The Mad Men star looked casual and cool in bright red yoga pants that matched her son's shirt, a striped tee and sunglasses as she hugged her darling son close while making her way though Beverly Hills, on Sunday afternoon.

Jones has yet to reveal the identity of her son's father, but she seems to be enjoying her new role as a single mom!

Like mother, like daughter!

Amy Adams and hubby Darren Le Gallo took their darling daughter Aviana out to lunch in Beverly Hills on Saturday afternoon, and it appears the little cutie is taking fashion cues from her momma!

The Enchanted star and her little girl both rocked matching red skinny jeans, but while Aviana carried a toy, Amy accessorized with a grey Prada bag. This lucky little girl, who turns 2 on May 17, is going to have a lot of fabulous hand-me-downs thanks to mom's A-list style!

Happy Mother's Day Amy!

Nothing says it's "officially over" like unfollowing your ex on Twitter!

Russell Brand finally made the decision to unfollow his soon-to-be ex-wife Katy Perry on Twitter this week, nearly three months after the former pair reached a divorce settlement.

While the "Firework" singer unfollowed the Arthur star almost immediately after he filed for divorce, it seems Brand had a much harder time severing ties with his ex-wife of one year.

The British comedian, who officially filed for divorce in December 2011, boasts over 4.6 million followers, but the grand total of lucky people he follows has been knocked down to 77.

Could recent pix of Miss Perry getting cozy at Coachella with Florence and the Machine guitarist, Robert Ackroyd, be the reason behind Brand's decision to hit "unfollow?"

Despite reports that their marriage is on the rocks, Gwen Stefani and Gavin Rossdale looked like the picture of happiness as they escorted their darling sons Kingston, 5, and Zuma, 3, to a fancy birthday party in LA, on Saturday afternoon.

The No Doubt singer looked rock star-chic in an all black ensemble paired with red boots and a tailored jacket she designed herself, while hubby Gavin kept it casual in cargo pants and a tee. Kingston displayed his passion for fashion by wearing a shirt that said "Working Class Hero," paired with camo pants and cowboy boots, while little bro Zuma rocked a Laker's tee, a studded belt and jeans -- they're such a stylish fam!

It's hard to believe Gwen and Gavin have already been married for a decade, and it wasn't until early this year that they've been "fighting nonstop" and have begun marriage counseling to save their union. After it was revealed in 2004 that the Bush singer had fathered a daughter, Daisy, with a former lover, Pearl Lowe, their marriage became strained, according to multiple reports.

The couple has yet to respond to the allegations, but their rep issued a statement calling the breakup “completely untrue,” and that the pair “are not divorcing.”

It's no wonder hubby Ben Affleck called wife Jennifer Garner a "world-class mom," she always puts her kids first!

The dedicated mother of three looked comfy in a flannel shirt, jeans and tennies as she took her darling daughter Violet to her ballet class in Brentwood, on Saturday afternoon.

The Oscar winner knows how important this special day is, and he gushed in a video message on Friday, "I just want to say Happy Mother's Day to all the moms in my life. My mom, Chris, and my amazing wife, Jennifer, who is an incredible, spectacular, world-class mom, and I want to thank her."

How sweet!

Jessica Biel really has that 60s look!

The newly engaged actress took a step back in time as she donned a long tight skirt, sexy red blouse and a vintage up-do to play Vera Miles, the actress who played Lila Crane for the upcoming film, Alfred Hitchcock and the Making of Psycho, on Saturday afternoon.

But our fave part about Biel's outfit was her $35,000 Row backpack, which she got as a gift from Ashley Olsen, lucky girl!

Justin Timberlake's wife-to-be, who joined Twitter last week, shared: "In love with my new #therow backpack. Thanks, Ashley."

Oscar winner Helen Mirren was also on the LA set alongside Biel, wearing a less-than flattering costume for her role as Alma Rainville, Hitchcock's wife.