5. Molly Sims

Follow her at: @mollybsims [2]

While it was her supermodel looks that first drew Sims into the public eye years ago, it's her hands-on devotion to life as a businesswoman, wife, and perhaps most importantly, mom to 2-year-old Brooks that have won us over on social media. With baby Sims-Stuber number two on the way, we're expecting big things from Molly in 2015 as well. Here, a few of her most memorable posts from the past year.

Cupcake Kid!

Molly's little boy, Brooks, is undeniably adorable, and his mom has a knack for capturing his cutest candid moments.

Baby Love

This second-time mom-to-be is always radiant, and her healthy living tips often make it onto her feed and lifestyle site [3], too.

Spirit of the Season

Molly and Brooks indulged their sweet teeth with Molly's mom's recipe for red velvet cupcakes. Their antlers and Santa hat only added to the festivity.

4. Jessica Simpson

Follow her at: @jessicasimpson [4]

Jessica's towheaded tots, Maxwell and Ace, are simply irresistible! Their always good-natured mom is proud to show off family snaps on a regular basis, and the verdict is, the Simpson-Johnson family knows how to have a good time. We love that newlywed Jessica and her husband Eric Johnson love goofing around as much as the kids do — see the evidence below!

A Beautiful Mess

Celebrity moms: they've embraced the chalkboard wall just as quickly as the rest of us have!

All in the Family

At her younger sister Ashlee's wedding this September, Jessica served as a bridesmaid while little Maxwell was a most perfect flower girl.

Thanksgiving Fun

"Thankful for these two WILD TURKEYS!" was Jessica's caption for this Thanksgiving snap of her seafaring tots on Lake Austin.

So in Love, It's Silly!

"Yummy!" was Jessica's one-word caption for this mouthful of a shot with her new husband, Eric Johnson.

3. Neil Patrick Harris

Follow him at: @instagranph [5]

We promised you there was a dad in the mix, and here he is! Neil Patrick Harris [6] has come a long way from his Doogie Howser, M.D. days, and his doting dad moments consistently make us smile. Twins Harper and Gideon live the good life with dads NPH and David Burtka all year-round, but Halloween [7] is consistently their moment in the spotlight. This family's got the group costume down to an art! See for yourselves ahead!

Gotham City Gang

They don't just rock the costumes, they act the parts, too!

Clowning Around

"NYC is the bestest," new Harlem, NY, homeowner Neil wrote of this shot of his three favorite people playing in a city park.

Twin Moment

Neil Patrick captioned this sweet moment with the caption "Best friends," and it's easy to see why.

2. Jessica Alba

Follow her at: @jessicaalba [8]

With a nearly billion dollar (and environmentally/socially conscious) company, a successful career on the big screen, and daughters Honor and Haven keeping her busy, it's no wonder that Jessica Alba [9]'s life is an exciting one to keep track of. Whether she's flying across the globe for a movie role, reviewing products at the Honest Co. headquarters, or kicking back with her kiddos on the weekend, Jessica keeps us constantly entertained.

We also love that with everything else she has going on, she still manages to make her nearest and dearest girlfriends a priority. Here, a few of our favorite snapshots of the Alba-Warren clan's 2014.

All in a Day's Work

Little Haven joined her mom at work, where they checked out the new Honest Summer diapers.

Three Generations

Jessica spent Mother's Day [10] with her girls and her mom — what could be better than that?!

Spa Day

Jessica may be used to some top-notch treatments when she's on set or headed to the red carpet, but at home, nothing beats Haven's manicures!

1. Busy Philipps

Follow her at: @busyphilipps [11]

Coming in first place as the most relatable, "keeping it real" celeb mom on Instagram is the always hilarious Busy Philipps. The Cougar Town star even went so far as to share her pregnancy test results (as in, the pee stick) with her 165,000+ followers, so you know she's not holding anything back! Here's proof!

Don't Text and Drive

. . . Hold hands instead! How cute are these two cruisers!?

Tooth Fairy Time

When her oldest daughter, Birdie, lost her first tooth last Summer, Busy polled her Instagram followers to find out the going rate for a tooth fairy visit.

Baby Love

Busy can't get enough of baby Cricket in her little headscarf, and neither can we!

Lice Are Not Nice

"#forrealfriday THIS SHIT IS SUPER REAL. Ugh. I have been SUCH a judgmental mom about lice- NOT MY KIDS. Well well well. I have learned my lesson. OBVIOUSLY. Also, I'm really sorry if your head starts itching after reading this..." Busy captioned her confession of the dreaded lice invasion at her home. Again, oh so relatable (unfortunately!).