The brunette bombshell went all-out for the final with deep smoky eyes and voluminous tumbling curls, teamed with a purple Kristian Aadnevik dress.
We totally assumed Alesha's smouldering make-up look came courtesy of a bunch of expensive products, but we were so wrong!
Alesha's make-up artist Kym Menzies-Foster created her look with plenty of budget-friendly products by Avon, which is hardly surprising since Alesha is the ambassador for the brand.
The best bit? Kym gave us the inside scoop on how she created Alesha's glamour-puss look - and it's super simple!
"I first prepped Alesha's face using the MagiX Face Perfector, £10.50. I then used Ideal Flawless Cream To Powder Foundation in Caramel, £12, which is the perfect foundation to create flawless skin. It glides on and looks smooth and natural on the skin - perfect for HD television!
"I wanted to create statement eyes so I used the SuperShock Eyeshadow Pencil in Princess Pink and Royal Velvet, £7 each. I then used the SuperShock Gel Eyeliner Pencil in Black, £6, along the inner rim of her eyes."
To finish her stunning look, hair stylist Michelle Sultan added Beauty Works Celebrity Choice weft hair extensions, £115, to Alesha's barnet, which she curled for added va-va-voom.
The pricey extensions may be an investment, but they're loved by many celebs including Nicole Scherzinger, Kimberley Walsh, and Made In Chelsea star Louise Thompson!
What do you think of Alesha's look? Let us know by commenting below as the best comment across the site each week wins £50!
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