Last year, Harvey Nichols taught us to "turn our walk of shame into a walk of pride" with our favourite Christmas advert of the season, and much to our delight, the department store has upped its game for the 2012 version.
Every girl gets the "what if she's wearing the same dress as me?" fear before a party, but has anyone ever had a style stand-off with a colleague, like this one below? Watch the video to see how to battle it out, Harvey Nichols style. We'll be practising our laser-beam stare, just in case.
Shop our favourite party dresses below:

Shop Party Dresses: 30 To Wow You With This Season
Full skirted tweed dress with contrast coated fabric raglan sleeves and piped seam detail, <a href="http://www.karenmillen.com/full-skirted-tweed-dress/dresses/karenmillen/fcp-product/102DP07440"><strong>Karen Millen, £190.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Stunning sparkling dress, <a href="http://www.newlook.com/"target="_hplink"><strong>New Look, was £59.99 now £30.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Dress, <a href="http://www.hm.com/gb/product/06531?article=06531-C"><strong>H&M, £39.99.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Kudalin sequined chiffon dress by Malene Birger, <a href="http://www.net-a-porter.com/product/325853"><strong>Net-a-Porter, £435.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Leather painted dress, <a href="http://www.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=1&viewAllFlag=&catalogId=33057&storeId=12556&productId=7591069&langId=-1&sort_field=Relevance&categoryId=208523&parent_categoryId=203984&pageSize=20"><strong>Topshop, £125.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Metallic strapless midi dress with pleated skirt, <a href="http://www.karenmillen.com/strapless-fluid-pleat-dress/dresses/karenmillen/fcp-product/102DP30638"><strong>Karen Millen, £210. </strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Pleated maxi dress, <strong><a href="http://www.tedbaker.com/women%27s/women%27s_clothing/dresses/list.aspx#-&styCode=94658&colRef=80-DARK%20ORANGE&path=/women's/women's clothing/dresses/">Ted Baker, £199.</a></strong>
Shop Party Dresses: 30 To Wow You With This Season
Gold metallic dress, <a href="http://www.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=1&viewAllFlag=&catalogId=33057&storeId=12556&productId=7938859&langId=-1&sort_field=Relevance&categoryId=208523&parent_categoryId=203984&pageSize=20"><strong>Topshop, £60.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Printed full skirt dress, <a href="http://www.tedbaker.com/women%27s/women%27s_clothing/dresses/list.aspx#-&styCode=102273&colRef=57-NUDE%20PINK&path=/women's/women's clothing/dresses/"><strong>Ted Baker, £199.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Fringe dress, <a href="http://www.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=21&viewAllFlag=&catalogId=33057&storeId=12556&productId=7940224&langId=-1&sort_field=Relevance&categoryId=208523&parent_categoryId=203984&pageSize=20"><strong>Topshop, £60.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Dress, <a href="http://www.hm.com/gb/product/06918?article=06918-A"><strong>H&M, £29.99. </strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Dress,<a href="http://www.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=1&viewAllFlag=&catalogId=33057&storeId=12556&productId=8130393&langId=-1&sort_field=Relevance&categoryId=208523&parent_categoryId=203984&pageSize=20"><strong> Topshop, £26.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Long sleeve sleeve soft georgette dress with a sunray pleated skirt and placed lace print design, <a href="http://www.karenmillen.com/lace-print-pleated-dress/dresses/karenmillen/fcp-product/102DP27860"><strong>Karen Millen, £175.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Cream print long sleeve tube dress with black side panels and waist detail, <a href="http://www.riverisland.com/women/dresses/bodycon-dresses/Cream-print-long-sleeve-tube-dress-628756"><strong>River Island, £35.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Lace ball dress, <a href="http://www.tedbaker.com/women%27s/women%27s_clothing/dresses/list.aspx#-&styCode=100057&colRef=57-NUDE%20PINK&path=/women's/women's clothing/dresses/"><strong>Ted Baker, £399.</strong></a>
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Dress, <a href="http://www.hm.com/gb/product/05773?article=05773-A"><strong>H&M, £29.99.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
lace dress, <a href="http://www.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=21&viewAllFlag=&catalogId=33057&storeId=12556&productId=7939853&langId=-1&sort_field=Relevance&categoryId=208523&parent_categoryId=203984&pageSize=20"><strong>Topshop, £36.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Dress, <a href="http://www.hm.com/gb/product/05919?article=05919-B"><strong>H&M, £29.99.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Geometric jacquard panelled ponte roma belted shirt dress, <a href="http://www.karenmillen.com/geometric-dress/dresses/karenmillen/fcp-product/103DP22502"><strong>Karen Millen, £175.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Jewel printed dress, <a href="http://www.riverisland.com/women/dresses/bodycon-dresses/Black-jewel-print-bodycon-dress-628849"><strong>River Island, £35.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Black sequin dress by DKNY, <a href="http://www.stylebop.com/uk/product_details.php?menu1=clothing&menu2=5&id=385341"><strong>StyleBop, £159.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Black dress by Catherine Malandrino, <a href="http://www.stylebop.com/uk/product_details.php?menu1=clothing&menu2=5&id=376521"><strong>StyleBop, £312.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Dress, <a href="http://www.hm.com/gb/product/07111?article=07111-B"><strong>H&M, £12.99.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
One-shoulder ruffled stretch-jersey dress by Valentino, <a href="http://www.theoutnet.com/product/182747?cm_mmc=LinkshareUK-_-0RpXOIXA500-_-Custom-_-LinkBuilder&siteID=0RpXOIXA500-cqfKNSToC5k7YBux6vWaEg"><strong>The Outnet, £469.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Dress, <a href="http://www.hm.com/gb/product/02293?article=02293-A"><strong>H&M, £12.99.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Black layered net sleeveless dress by Marios Schab, <a href="http://www.farfetch.com/shopping/women/marios-schwab-embroidered-dress-item-10266788.aspx"><strong>Farfetch, £1935.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Fuchsia long sleeve wool dress with bows by Valentino, <a href="http://www.stylebop.com/uk/product_details.php?menu1=clothing&menu2=5&id=390181"><strong>StyleBop, £1273.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Black beaded dress by DKNY, <strong><a href="http://www.stylebop.com/uk/product_details.php?menu1=clothing&menu2=5&id=383251">StyleBop, £ 312.</a></strong>
Shop Party Dresses: 30 To Wow You With This Season
Leather-look grey midi dress, <a href="http://www.riverisland.com/women/dresses/bodycon-dresses/Grey-colour-block-bodycon-dress-628302"><strong>River Island, £40.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Sleeveless shift dress, <a href="http://www.kookai.co.uk/collection-1/dresses-1/crochet-insert-dress-17068.html"><strong>Kookai, £38.</strong></a>
Shop Party Dresses: 30 To Wow You With This Season
Spot jacquard dress, <a href="http://www.tedbaker.com/women%27s/women%27s_clothing/dresses/list.aspx#-&styCode=100059&colRef=00-BLACK&path=/women's/women's clothing/dresses/"><strong>Ted Baker, £149.</strong></a>
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