16 Must-See Instagram Pics of '90s Pop Stars With Their Kids

Singers and artists who were responsible for some of the biggest hits of the '90s and early 2000's are now all grown up—and it's pretty scary. Come on, didn't you feel old when you found out that Lizzie McGuire had a kid?! Here's some of our favorite recent family Instagram photos from the biggest pop stars of yesteryear who are now old enough to be parents. Warning: You are about to feel ancient...

From "Baby...One More Time" to actual babies, Britney Spears is now a mom of two! She has two sons, Sean Preston and Jayden James, with ex-husband Kevin Federline.

Nick Lachey, formerly of 98 Degrees, has put his boy band days behind him and is now on full-time daddy duty. His son, Camden, with wife Vanessa Lachey, is basically his mini-me.

The girl who rocked bandanas and cornrows back in '01 is now a proud wife and mama. Here's Alicia Keys with her husband, Swizz Beats, and their little guy, Egypt.

Gwen Stefani just joined Instagram recently so we won't hold it against her that she's got zero photos of her two sons, Kingston and Zuma, on her page. But she did post this baby bump selfie of her carrying baby boy number three! This counts, right?

Jessica Simpson may no longer be a pop star, but now she's an amazing fashion designer and an even better mommy. And she posts the most adorable photos of herself with her daughter, Maxwell, and her son, Ace Knute (that's him).

Usher is no longer just singing about cheating on baby mammas (like he did on his song, "Confessions"). He's got an actual baby mama and two adorable sons to boot!

Pink is still a major pop star (if you haven't seen her on her 'Truth About Love' tour, go do it), but don't be "Mizzundazstood"—she's still got the mom thing down pat. Pink and her husband Carey Hart became parents to daughter Willow Sage in 2011. (PS: Sorry for that terrible "Mizzundaztood" joke).

Fergie, the lead singer of the Black Eyed Peas, became a mom in August of 2013, putting her music on the back burner quite a bit. But when the result of such a break is an adorable baby boy like Axl Jack, a mini hiatus is totally worth it.

Nowadays, the only thing Jewel's "hands" are being used for is changing diapers and taking care of her son, Kase. Get it? "Hands?"

Jennifer Lopez is now a mom to twins Max and Emme with ex-husband Marc Anthony, and they even get to go on tour with her! Think the toddlers appreciate some old school JLo a la "Love Don't Cost a Thing?"

Hilary Duff's gone through quite her own "metamorphosis" over the years—she's gone from Disney star to pop star to mom to adorable two-year-old, Luca.

Mariah Carey's been in the biz since the early '90s (!!!), but she's still relatively new when it comes to motherhood. MC and husband Nick Cannon welcomed twins Roc (Moroccan) and Roe (Monroe) back in 2011.

"Whenever, Wherever" was probably Shakira's greatest accomplishment—until this little guy came along. Shaq and her boyfriend Gerard Pique welcomed their first child, son Milan, in January of 2013.

Every single one of the Spice Girls is a mother now, and they've got 11 kids between the five of them! Melanie Brown, aka Scary Spice, definitely posts the cutest pics of her and her kids though. Here's Mel with her daughters Phoenix, Angel and Madison.

In 2010, Alanis Morissette got married to Mario Treadway and became a mom to this cute little guy, Ever. We bet Dave Coulier, Alanis' 90s boyfriend who she allegedly wrote "You Oughta Know" about, is really rethinking things right now.

But the mother of all, uh, celebrity pop star mothers is the one and only Beyonce. Sorry, everyone else on this list, but Blue Ivy is the best pop star baby of all time.