Courtesy Taronga Zoo

The Ritchie-Madden family is having a wild time Down Under!

Nicole and Joel's adorable kids, Harlow, 4, and Sparrow, 2, got a huge treat while their dad was off duty from his gig as a judge on The Voice Australia, by spending a fun-filled day at the Taronga Zoo in Australia, on Wednesday afternoon.

The cute kids got up close and personal with a friendly giraffe, who they took turns feeding, and they also got to visit with Yindi, the koala!

After their adventure at the wild animal park, Ritchie Tweeted: "Thanks [Taronga] Zoo for having us today with the kids," while Madden added, "They are still buzzing from it. Can't get enough. We'll be back fo sho."

Katherine Heigl may have just added a newborn baby to her family of three, but the actress still managed to look happy and well rested as she ventured out of her Los Feliz neighborhood solo, on Thursday afternoon.

The Knocked Up star and her musician hubby, Josh Kelley, confirmed the news last month that they had adopted a baby girl, Adalaide Marie Hope, and the proud parents recently posed for a series of new family pix that will be unveiled in an upcoming spread for the UK's Hello! mag.

Heigl also opened up to Hello! on the first time she held baby Adalaide, confessing: "She was so tiny and delicate, and that moment they put her in my arms I just felt an overwhelming sense of awe and wonder that this perfect little being was our daughter." Congrats!

Twitter

We can't believe baby Luca is already 2 months old -- he's getting so big!

New mom Hilary Duff shared a Twitpic of her growing baby boy, who sported an adorable banana peel onesie, with the caption: "Me and my beautiful boy! So much to be thankful for!"

The former Disney star and her hockey player hubbie, Mike Comrie, welcomed baby Luca Cruz on March 20, and he's been getting smothered with attention ever since!

Duff recently confessed via Twitter: "Babies smell soo good!! I can't get enough. Poor guy gets loved on so much.... I wonder if he ever feels like ‘yo mom, dad give me some space!’"

The Beauty and the Briefcase star has been working overtime to lose the baby weight since Luca's arrival, taking a combination of SoulCycle, and pilates to regain her post-baby 'bod.

We think Hil looks better than ever!

Yet another reason why we absolutely adore the 19-year-old superstar -- she always makes time for her fans!

Miley Cyrus and her mom Tish were snapped leaving their Miami hotel today, and the former Hannah Montana starlet took quite a bit of her time to pose for photos with the young ladies camped outside.

Miley showed off her long and lean physique in a clingy grey dress, but rather than rocking a pair of sandals or high heels, she sported a pair of combat boots. Hey, whatever works!

Kourtney Kardashian went to a doctor's appointment in Beverly Hills today, and the preggers reality starlet was in good spirits when we snapped her coming and going.

Kourtney is due sometime in June, and while she previously revealed that she's having a girl, she hasn't given us any hints as to what she might be naming her daughter. "I love being pregnant!" she tweeted. "Such a magical and beautiful feeling. Feeling blessed!"

However, yesterday she wrote, "Having a lot of siblings is essential. When you are hating one, there are more to love. I might need to have a whole bunch for my children!" We're not sure where that came from, but rumor has it Kourtney suffered a "meltdown" after seeing her sister Kim flirting with baby daddy Scott Disick!

According to OK! Magazine, Kim and Scott were chatting “a little too closely and a little too long” at the New York City opening of his new restaurant RYU last month. Kourtney apparently felt "betrayed" by Kim's actions, and a source tells the mag, "Anything can set her off and send her into the most vicious temper tantrum." Yikes!

Paris Hilton was snapped leaving the hair salon in Beverly Hills this afternoon, and the heiress was definitely dressed to impress in a sheer black maxi, but it sounds like she's still tired from her recent vacation.

A few hours ago P tweeted, "So jet lagged, went to bed so early last night and just got up. Still on Europe time. Ready for another busy day." Aww, hopefully she'll be in the right time zone tomorrow! We were totes having Paris withdrawals while she was overseas...

Katy Perry is ready to give the world an inside look at her life both on and off the stage.

The "Fireworks" singer is starring in the upcoming concert movie Part of Me 3D. In the big screen flick, Russell Brand's ex is opening up about the pressures of fame and her failed marriage.

Ms. Perry's movie hits theaters on July 4.

More over Oprah, there's a new media mogul in town!

Jennifer Lopez tops the Forbes Celebrity 100 list this year, pushing Oprah Winfrey to the #2 spot.

"With $52 million in earnings over the last 12 months and a massive amount of fame, Lopez lands at No. 1 on our Celebrity 100 list for the first time," Forbes' Dorothy Pomerantz said in a statement.

The list isn't based solely on financial earnings and includes all types of celebrities, such as film and TV actors, models, athletes, and musicians.

Justin Bieber came in behind the power ladies at #3. He better thank his Beliebers!

Other notable newcomers: Rihanna (No. 4); Kim (No. 7) and Khloe Kardashian (No. 73); British songstress Adele (No. 24); Sophia Vergara (No. 76); and Ashton Kutcher (No. 51).

Why did Jenny from the Block come out on top?

Her American Idol judging duties, film roles, singing career, Kohl's clothing line deal, and various endorsements all contributed to her crowning title.

We wonder how Casper Smart plans on congratulating his lady?! With a ring, perhaps?