Oscars Countdown: Celeb Beauty Tricks and Cleanses

— -- With three days until Oscar Sunday, “GMA” has the stars’ best red carpet beauty and diet secrets.

For tips on slimming down, celeb nutritionist Haylie Pomroy said stars like Kirsten Dunst and Jennifer Lopez swear by her book, “Fast Metabolism Food RX." The five-to-10 day cleanse incorporates a plant-based protein mix, unlimited vegetables and a healthy dinner into your diet.

“It’s easy, it’s effective, a lot of our clients can lose 10 pounds in 10 days, 5 pounds in 5 days, but it’s more about just looking incredible,” Pomroy said.

For a photo-ready face, actress Gwyneth Paltrow and Drew Barrymore seek out celeb skincare expert Sonya Dakar, who uses crushed ice spiked with stem cells to stimulate blood flow and help plump the skin.

To get that to-die-for Victoria Beckham and Angelina Jolie jawline and ageless neck, celebs turn to Kat Rudu for facials. Rudu uses non-invasive radio frequency at her Beverly Hills salon to penetrate the deep layers and smooth out the skin.

For eyebrows like Emma Watson and Cara Delevingne, stars head to brow bar Makeup Mandy.

“Brow extensions [are] similar to the lash extensions where it’s a hair bonded to each hair, so it gives you that perfect eyebrow with no makeup,” said owner Amanda Jacobellis.