The 22-year-old model - who is married to pop superstar Justin Bieber - likes her lips a lot and although she prefers to go for a natural look when it comes to her make-up on a daily basis she still adds a bit of colour to her pout to accentuate her mouth.
When asked what her favourite feature is in an interview with ELLE magazine, she said: "Probably my lips. If I'm going out for the day, I like stains, like a lip balm that's tinted for a little bit of colour. To be honest, I prefer when I'm the most natural - when I'm not wearing a lot of makeup and my hair is up, very casual."
As for her favourite lip product, the blonde beauty uses a 100 per cent natural tinted lip balm by Burt's Bees which, according to their website, "enhances your lips with a rich shade while botanical waxes" and she uses Shea butter to "nourish and soften dry skin".
She said: "Burt's Bees makes good tinted lip balms. They're super conditioning, and the shades aren't too intense."
Hailey - who is a brand ambassador for skincare brand bareMinerals - also revealed that she swears by the line's Complexion Rescue! Hydrating Foundation Stick, for a natural looking glow.