The Oscars are back this weekend, and every A-list celebrity will be glammed up for the throngs of cameras mercilessly showing every angle on the red carpet.

Celebrities often post flawless selfies after they’re ready to roll, but we wanted to know what beauty prep it takes to get to Hollywood’s biggest awards event. Just like us, celebrities love to tap into the power of cosmetic treatments before big events — ones that especially have little downtime and deliver amazing results.

We went behind the scenes with doctors in Los Angeles and New York to get the scoop on the top cosmetic treatments celebrities are using this year to get Oscar ready.

Under-eye fillers

Between nonstop schedules and inevitable volume loss under the eyes, it’s a struggle to not look tired. Fillers like Belotero, Restylane and Volbella are common for the tear-trough area, but your injector will help you choose the right one for you.

There are two options to inject filler under the eyes: microdroplet insertion (more precise) and cannula injection (more comfortable). Most people need anywhere from half a syringe to four syringes to achieve desired results. Downtime is minimal, but plan on two to three weeks before any big event in case of swelling and bruising.

“Tear-trough augmentation is a best-kept secret of Hollywood because it gives you an airbrushed look,” says Dr. Lara Devgan, a New York plastic surgeon. “Almost like you are wearing concealer.”

According to prices reported on RealSelf, expect to spend around $1,000 on injectable fillers.

Famous fan: Katy Perry told Refinery29 that she underwent the treatment and would recommend it to “everyone who wants a solution for their dark circles.”

Microblading

Perfect eyebrows are very now, so it’s no surprise that eyebrow microblading is a top cosmetic treatment requested by celebrities. With a 70 percent Worth It rating on RealSelf to date, it’s a popular treatment with anyone who wants fuller, thicker, more beautiful brows.

Microblading is a semi-permanent tattoo treatment to fill in sparse brows. A hand-held tool is used to apply pigments that simulate eyebrow hair. Since it’s semi-permanent, you will need yearly touch-ups to maintain the look.

Make sure to give yourself a week before a big event — and before freaking out about your results. It takes a few days for brows to heal, and show their true size and color.

According to prices reported on RealSelf, you should expect to spend around $425 on microblading.

Famous fan: Olympic gymnast Simone Biles had microblading last year.

Zoom whitening

Dr. Victoria Veytsman, a New York dentist, loves Zoom whitening for fast, efficient teeth whitening. She says it’s the “quickest, most conservative thing you can do to improve your smile for an instant boost” and uses it herself, too.

The whitening procedure only takes an hour and is usually done once or twice a year. “You can get anywhere from three to seven shades lighter depending on where you are starting,” says Veytsman. “It uses hydrogen peroxide, which oxidizes stains off enamel with no damage.”

According to prices reported on RealSelf, you should expect to spend around $375 on Zoom whitening.

Famous fans: Dr. Veytsman’s Instagram shows Hailey Baldwin, Karlie Kloss, and other top models and “A-listers.”

HydraFacial

Celeb facialist and practice manager Graceanne Svendsen at Shafer Plastic Surgery in NYC often helps A-listers before big events. She recommends the instant gratification of the HydraFacial, a hydradermabrasion facial that hydrates skin and helps minimize pores.

Svendsen recommends a few more treatments to maximize results.

“I love a sulfur sheet mask on the day of the big event,” she says. “Sulphur cuts down oil and bacteria, which cause breakouts, so you are camera-ready. Typically, my patients come in for a quick, high-frequency touch-up or VBeam for cystic acne on the day of, using the at-home sulfur sheet mask to help.”

According to prices reported on RealSelf, expect to spend around $150 on a HydraFacial.

Famous fan: Fifth Harmony member Normani Kordei.

Botox or Dysport

While toxins, like Botox and Dysport, are typically associated with banishing wrinkles, Dr. Joshua Zeichner, a Manhattan dermatologist, says that these are also great for decreasing sweat, minimizing oil production in the skin and shrinking the appearance of pores. While not FDA-approved for these purposes yet, many people are seeing great benefits when toxins are used off-label by a medical expert.

Dr. Zeichner adds a warning: “You have to be careful about where you inject toxins to reduce oil production as they carry with them the same effect on muscles regardless of why you are using it.”

Famous fan: As Kelly Ripa said, “You just can’t beat fresh Bo.”