See the Britney & Justin Costumes That Won Spears' Seal of Approval!

Celebrity stylist Monica Rose dressed up her kiddos, Alaia and Salvador, as Britney Spears and Justin Timberlake for Halloween -- and this Instagram pic is taking us right back to 2001.

Sporting the pop star's signature denim dress and sparkling choker, the little fashionista looked like the spitting image of the "Toxic" singer. Her younger bro also nailed JT's throwback look in a denim jacket, jeans and matching hat.

It's hard to believe it's been 14 years since the famous exes' historic style moment took place, but it seems Brit still has a soft spot for her former flame ... or at least these outfits.

The mother-of-two re-posted the Halloween snapshot on Instagram, and she even kept the very important hashtag: #britneyandjustinforever." Talk about the ultimate seal of approval!

We can't forget about Britney's kids either. Sean Preston and Jayden James got in the spooky spirit as well, dressing up as a creepy military man and a scary clown.

"My boys getting into a little Halloween mischief," the proud mama wrote before the boys headed out to get their candy.

Check out ALL of the best celebrity costumes in the gallery at the top!

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