They may have millions in the bank and the most prestigious beauty houses bending over backwards to gift them products, but our favourite A-listers don't turn their noses up at cheap and simple tricks when it comes to beautifying. From Shailene Woodley colouring her lips with roasted beetroot to Kate Moss submerging her face in cucumber water, it seems the stars' best kept beauty hacks start in the kitchen. Insurgent actress Shailene, who is a big fan of natural beauty, has confessed to cooking the vibrant vegetable to use it as an alternative to lipstick. Insurgent actress Shailene Woodley colours her lips with roasted beetroot rather than lipstick... and she's not the only celebrity who favours natural beauty products . She told Bon Appetit magazine: 'It's totally awesome. Beets are amazing. If you roast them you'll get a better lipstick. 'They're not as potent and they don't stain the same way if they're raw. So I roast them first and then just dab a little of the juice on my lips with my finger.' The 23-year-old star isn't the only celebrity who swears by unusual products when it comes to looking her best. Gossip Girl actress Blake Lively  revealed the secret behind her glossy blonde locks comes from her fridge. Blake Lively says her mother taught her to slather mayonnaise on the bottom half of her hair before showering to avoid it drying out . She told Byrdie: 'My mum taught me this really great beauty tip. She used to put oil or mayonnaise on the bottom half of her hair before she would shower. 'That way, when she would shampoo, the soap wouldn't strip the bottom of the hair and dry it out, making it brittle.' Meanwhile, 12 Years A Slave actress Lupita Nyong'o combats her dry skin with oily vegetables. She told Harper's Bazaar last year: 'Avocado oil is a big thing for me. I discovered it last year, and at first I was using it just on my body, but then I realised it works on my face, and my hair too, for that matter! 'Especially in the wintertime, when my skin is drier, it really seeps in and leaves it nice and lush.' Lupita Nyong'o combats her dry skin with  avocado and loves to use it on her locks, too . Blonde-haired bombshell Scarlett Johansson is famed for her china doll skin and plump red lips. And while the actress can afford to splurge on a plethora of skincare treatments, the A-lister has been guarding a rather cheap and unusual beauty secret. The Avengers star has revealed that she uses apple cider vinegar as a cleanser. The 30-year-old slathers the natural product across her face to keep her spots at bay. While the actress did admit that the product - which is priced at around £1.50 in stores such as Holland & Barrett- can be harsh on skin, it has actually been effective in treating her spots. Speaking to Contactmusic about her beauty secrets, she revealed: 'I researched natural skincare and found that apple cider vinegar is really effective. 'Using it as a toner can be harsh, but if you have breakouts it can be really healing. 'It's a little bit stinky but if you're not sleeping over at your boyfriend's it's really effective!,' she added. Scarlett Johansson has revealed that she uses apple cider vinegar as a cleanser and to keep her spots at bay . Natural beauty Catherine Zeta- Jones is happy to use her own homegrown beauty secrets, such as rubbing honey and salt on her skin to beat wrinkles, washing her hair in beer and brushing her teeth with a strawberry. In an interview with Now Magazine back in 2009, the actress admitted that the answer to preserving her youthful appearance lies as much in her kitchen as her make-up bag. 'I rub a mixture of honey and salt all over my body to moisturise and exfoliate,' she said. 'You wash it off and your skin is gorgeous. Also, I love to eat an apple after a meal, just to cleanse my teeth - they always look polished afterwards.' If there aren't any apples in the fruit bowl, a strawberry will suffice. 'The juice or pulp of strawberries contains malic acid which serves as an astringent and can lighten surface stains,' she explained. 'Pineapples work the same way.' However, while her rather unusual beauty regime appears to have its benefits, she admits it has its drawbacks too. 'I do condition my hair with honey and beer. 'I smell like the bottom of a beer barrel for days afterwards but it's very good for the hair.' Kate Moss submerges her face into a sinkful of iced cucumber water in the morning to perk up her skin . As someone who likes the odd cigarette and night out on the town, many are left wondering how does Kate Moss maintain such a glowing visage? The supermodel submerges her face into a sinkful of iced cucumber water in the morning to perk up her skin. 'If I wake up looking tired and puffy, I fill a sink with ice and cucumber and submerge my face. 'It tightens everything making you look and feel instantly awake. It is a bit Joan Crawford - but it works!,' she told Stylist magazine. Cucumber and the skin share the same level of hydrogen, so the fruit can easily help to cure problem areas.
Shailene Woodley colours her lips with roasted beetroot . Blake applies mayonnaise to the ends of her hair when she showers . Kate Moss submerges her face in cucumber water .