It's time to spruce up your closet and get fall-ready. Here's some inspiration with the hottest trends from the top Hollywood celebrities and models.

THE FANNY PACK MAKES A COMEBACK!

Newly-married Hailey Baldwin Bieber wears a designer fanny pack in L.A., and it's nothing like the way it's used to be worn!

No, Mrs. Bieber didn't wear her fanny pack dad-style like in the '90s. Hers is the Louis Vuitton New Wave Bumbag in quilted leather flaunting the LV signature gold clasp. She styles the hands-free bag ready for the runway by wearing it cross-body.

What she wore with it highlighted her LV bag even better: a silky two-piece ensemble with pristine white low-top sneakers. She accessorized it with her signature Jennifer Fisher hoops, and the model didn't walk on the streets without her Gentle Monster x Alexander Wang snake-rimmed sunglasses.

Trade your neon-bright fanny pack with an elegant luxury fanny, and complete the look with a classy ensemble and keep it casual with your go-to white sneaks. You may want to skip the waist and don your fanny pack over your body a la Hailey Bieber too.

ROCK THE COMBAT BOOTS THIS FALL

Bella Hadid is taking a different turn with her choice of shoes for fall, and she's totally rocking it. Combat boots on the supermodel looked cute yet practical -- a style that street-style paparazzi quickly took photos of.

Clad in a sweet pink double-breasted blazer on top of a Vivienne Westwood button-up and light-wash jeans, she took the unexpected route with her footwear by trading nude heels for a punk-style, mid-calf combat boots.

She accessorized her sweet-grunge look with a New York Yankees baseball cap, tiny sunglasses, and her trusty '90s-inspired shoulder bag.

Cop the look with a sweet and pretty ensemble then totally blow our minds with grungy heeled boots.

FLARED DENIM IS HERE AGAIN!

It seems like "Once Upon a Time in Hollywood" hasn't rubbed off of Margot Robbie yet as she continues to walk the streets a la Sharon Tate with her groovy '60s-inspired ensembles.

The recent Fashion Month also took us back this era as well as flashbacks of the '70s. Celine is bringing back hippy jackets and flared jeans, and the celebs are following suit on the streets.

Robbie graced the New York Comic Con in a pair of high-waisted, light wash, wide-legged jeans. She chose a cropped Chanel sweater with gold detailing for her top. Her platform shoes are a flashback of the '70s as well, accessorized with nothing but sleek black sunglasses.

It's time to trade your skinny jeans for flared jeans and a crop top this fall, trendy and retro just the right way.

THE SWEATER SET TREND THAT'S NEVER SLOPPY

The retro vibe doesn't stop there, as Rihanna is channeling a look from the '40s and bringing it to Manhattan. The Fenty mogul looked effortlessly elegant in a cream cashmere wrap bodysuit from the Michale Kors Fall 2019 Collection.

The singer elevated the tank and cardigan trend with an asymmetrical top with mock sleeves tied near the shoulder (a twist to the clothing staple we love for comfort). She opted for light wash Balenciaga jeans and her new fave, Bottega Veneta mules.

The key to copping this look is to switch to a form-fitting bodysuit and spaghetti straps. Love your shape, ladies!