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Brook has also done a large amount of commercial swimwear, sportswear and hosiery modeling. Her work for Triumph Bras caused quite a stir because of specially-commissioned 50-foot (15 m) high billboards of Brook's bust, said to be the largest billboards in the world. In 2005, Brook posed for a ten-page, partially-nude black-and-white photo spread with the photographer David Bailey. The results were featured in the British design magazine Arena, the November 2005 issue.In 2006 she signed a contract, reported to be worth around £1m, to be the presenter of Unilever's Lynx body spray, known as Axe in the US and on continental Europe. She has appeared on billboards, in newspapers, and on-line as part of an advertising campaign.She has also appeared in commercials for Sky + and most recently T Mobile.