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...
Britney Spears Sons Preston and Jaden
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 and Son Camden
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.
Alicia Keys and Son Egypt
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 Pregnant
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 with Son Ace Knute
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 and his Sons on The Voice
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, Carey Hart and Daughter Willow
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 and Son Axl Jack Duhamel
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.
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Jewel and Son Kase
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 with Twins Max and Emme
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 and Son Luca
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, Nick Cannon and Twins
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.
Shakira and Her Son Milan
"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.
Melanie Brown With Her Three Daugthers
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.
Alanis Morissette and Son Ever
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.
Beyonce and Daughter Blue Ivy
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.