Pippa Middleton headed off to work today in London, toting a bright red bag. She's logging her last day of the work week in which she also celebrated her 28th birthday! There may be some celebrations in store for Pippa and the Middleton family, especially since her big sister Kate was recently seen shopping for cake baking pans. Palace spokespeople denied rumors a few days ago that Kate and her husband William are expecting twins, so it seems Pippa will have to wait a bit longer to become an aunt. There's nonetheless lots of excitement in store for Pippa over the next year, considering the attention and opportunities that came her way following her star turn at Kate's April 29 wedding. Kate, of course, is the even bigger style setter, and it's expected that the Duchess of Cambridge will influence runways at fashion week this season.