Can you believe Selfridges is 100 years old this year? Nope, us neither. But we're happy to see it has aged gracefully - and is still the one-stop shop for designer, high street and beauty must-haves under one, exquisitely glamorous, roof. To celebrate its centenary, Grazia has teamed up with Selfridges for its Beauty 100 events - find out more here. Every Thursday in May, Selfridges is throwing open its doors for a late-night beauty extravaganza, with top make-up artists sharing tips, live music and an opportunity to be spotted by Grazia's beauty hunters. Because each week, we'll be on the prowl for five beautiful beauty looks which will then appear right here on Grazia Daily to compete for the public vote. One beauty look per week will be voted as the best by you, with the four finalists whittled down to one winner supreme by beauty director Annabel Jones. The winner will win a selection of spa treatments, including a facial, back massage and pedicure at Cowshed's Clarendon Cross Spa. Hurrah! So join us at Selfridges on this Thursday 7 May for the first event. And if you can't wait until then to celebrate, here's a little treat for you. Just answer the question below to be in with the chance of winning over £4000 worth of beauty products all stocked in Selfridges beauty hall. Good luck!