I reveal their top tricks and uncover the best mattifying powders. Make-up meltdown begone!
1. Don't do an 'Angelina!' The star's make-up mishap at the premiere of The Normal Heart last month (12 May) was down to an overload of powder containing SPF which reflects camera flashes. Take inspiration from Nicole Scherzinger instead - 'I only use a little powder on my T-zone, not all over my face. I like to keep some areas - like my cheekbones - highlighted,' she says.
2. Try different tools with different powder formulas. 'I apply pressed powder using a buffing brush,' says Millie Mackintosh. Try Eco-Tools Bamboo Buffing Brush, £9.99, to really work it into your skin. 'When I'm using loose powder, I put a little on a tissue and use a big fluffy brush,' she explains. Prefer a puff? Press and roll it over your skin, don't rub.
3. 'Blotting papers are lifesavers!' says Khloe Kardashian. Just dab them onto skin to absorb excess oil. Try Kiko Blotting Papers, £6.90 (kikocosmetics.co.uk).
4. Primer is a fab weapon too. 'I ask my client where they shine the most then apply a mattifying primer, before foundation, to that area only,' explains celebrity make-up artist Gary Cockerill. Illamasqua Matte Veil, £30, and The Body Shop All-In-One InstaBlur, £14, are fab newbies.
Powders: tried and tested
Rimmel London Stay Matte Powder, £3.99
Way better than pricier powders! It banishes shine straight away without looking cakey. Perfect for midday top-ups.
Urban Decay Naked Skin Ultra Definition Pressed Powder, £22
Unlike any other I've tried. It's not shimmery but gives a soft-focus finish that's super-flattering. Great if you want a glow but not grease. It lasts for ages too.
Vichy Dermablend Setting Powder, £15
Loose powders aren't practical for on-the-go but they're the best for setting foundation. This one really keeps oil at bay and makes skin look airbrushed.
Good shade range
MAC Blot Powder Pressed, £20
Even 'translucent' powders sometimes look ashy on dark skin. But this one has a colour to flatter all and looks invisible. Plus, TOWIE girls including Sam Faiers, Billie Faiers, Lucy Mecklenburgh and Ferne McCann told me they swear by it!
What's your must-have powder? Tell us below as the best comment from across the site each week wins £50!