Emma Stone likes to exfoliate with baking soda.

'The Amazing Spider-Man' actress has shed some light on her beauty regime, claiming her best-kept skincare secret involves scrubbing her face with a handful of sodium bicarbonate - which is traditionally used as a raising agent for baking.

She told France's ELLE magazine: ''When I want to exfoliate my skin, I simply scrub it with some baking soda.''

The star is equally low-key when it comes to her fitness plan and admits she hardly ever works out, preferring to practice relaxing techniques like yoga instead.

Emma said: ''At the moment I don't do that much, but I know I need to change that. I'm trying to get into yoga, I like it and apparently it's very good for you. As well as yoga, I do a bit of meditation.''

The 24-year-old beauty also has a junk food habit and claims to not watch what she eats.

Quizzed about her best diet tip, she replied: ''Nothing in particular, but I should start to, I eat way too much sugar.''

Emma - who regularly tops 'most stylish star' polls - always tries to use deep conditioning masks and products made especially for blonde hair to keep her tresses in good condition.

She explained: ''I'm not really in the know when it comes to haircare. But since I've become blonde again, I use specially adapted products. Otherwise, I'm a fan of coconut oil hair masks as before applying shampoo.''