Reese Witherspoon, Eva Longoria and other celebs love these under $20 skin care finds

On her website, Martha Stewart revealed the 14 beauty products she swears by, and this glow-enhancing priming lotion is near the top of the list. Her trusted makeup artist of 10 years, Daisy Toye, said she applies it to Martha's face after SPF to add dewiness and create "a smooth canvas for makeup." Infused with glycerin and shea butter, the "glotion" hydrates and moisturizes the skin and helps enhance its natural glow.

Instantly hydrate and highlight your skin with Lumi Glotion for a gorgeous, luminous look — choose from multiple shades to best enhance your glow! Prices vary slightly based on shade.

Bethenny Frankel is a big fan of anything Bliss: "Bliss was the first spa chain that I can remember, and now they can reach everyone. I always remembered that Bliss products were amazing ... I love [the] entire Bliss Vitamin C skin care range," she said in a video on her YouTube channel.

This serum contains a high concentration of Vitamin C along with tri-peptides and green tea extract to help get skin to its youthful, glowy best.

Eva Longoria demonstrated her hair routine in a video, spraying L'Oreal Paris Magic Root Cover Up onto her part to camouflage silver strands. "If you’ve been following me, you know I've been going gray," she said. "So I have my favorite solution, Magic Root Cover Up. This thing's awesome because it has a little nozzle that makes it really specific."

Available in nine shades, this spray conceals grays until your next shampoo. With nearly 53,000 five-star ratings, it's also super-popular, and we can see why.

This cream contains Salma Hayek's secret weapon ingredient for youthful-looking skin: Tepezcohuite. It comes from a tree often called the "Mexican skin tree" because its bark is known to help regenerate skin and hair. It was used to treat hundreds of thousands of burn victims in an earthquake and a gas explosion in Mexico in the 1980s when no medical supplies were available.

"I use an ingredient called Tepezcohuite that's used in Mexico for burn victims because it completely regenerates the skin," Hayek told Elle. "Some of the ingredients, when I took them to the American labs, they were like, 'Oh my God! How come nobody is using this?' This is why I have no Botox, no peels, no fillers."

Thinking about switching up your facial cleanser? Reese Witherspoon loves Cetaphil. "I use the face wash, and I travel with it ... I love drugstore makeup, too," she told Refinery29. "I remember going as a little girl to the drugstore down the street from my grandmother's house, and I'd spend hours looking at nail polish and lipstick and blush."

The affordable face wash is infused with glycerin and niacinamide to hydrate skin while it cleanses it.

Drew Barrymore called this cleanser "by far the best makeup remover I've ever used," but it does so much more: It'll streamline your skin care routine and allow you to wash your face without regular water (even if you don't wear makeup). It instantly wipes away grime and works well for almost everyone, including those with sensitive skin.

Julia Roberts loves this ultra-rich cream, formulated with nourishing natural ingredients like extracts from rosemary, chamomile and pansy in a base of sunflower and sweet almond oils. It's safe for use on any skin type and on any area of the body. No need for a facial moisturizer and a separate body lotion!

“I put it on my hands after I wash the dishes, and wind up putting it on my elbows and feet," Roberts told InStyle. "Before you know it, I’ve squeezed this poor little green tube into a twist.”

Olivia Wilde is one of the brand's many fans. "I use the cheapest possible skin care — not because it's cheap, but because it's the best," she once said. "Dermatologists have recommended it for years and I've never paid attention. But recently I started using Cetaphil cleanser and CeraVe moisturizer. They're gentle and simple."

This lightweight, oil-free lotion contains an SPF, so not only does it help keep skin moisturized, but it also prevents it from burning and developing bad sun damage.

Jennifer Garner has long been a fan of Neutrogena’s affordable yet effective products, so much so that she has been a longtime ambassador for the brand. Last year, the actress shared with InStyle magazine that the Hydro Boost Water Gel Moisturizer is one of her favorites from the skincare brand.

“I can instantly tell the difference — it just looks fresh and plump and better. There are all these little micro-lines that once I put this on, they go away," she said. "This is 48 hours of moisture that you're locking in with one thing, and then I don't have to worry about it…I think it's my favorite product we've ever put out.”

Top Chef host Padma Lakshmi has a memorable smile made for TV. To keep her lips supple, she uses ChapStick Tinted Lip Oil. With vitamin E, vitamin C, and omegas 3, 6 and 9, this oil helps replenish moisture and nutrients to your lips and adds sheer color and subtle shine to them.

"It's an oil that hydrates your lips," she said in a video for Vogue. "It has a little color in it and I just let that soak in. This is just to really get them moist."