Lindsay Lohan buying a bottle of water downtown ... Mary-Kate Olsen leaving a yoga class in SoHo ... Christina Applegate arriving at ABC studios in Midtown ... Sienna Miller shopping at Williams-Sonoma in SoHo ... Mark McGrath walking downtown ... Renee Zellweger getting in an SUV after an appearance on Good Morning America ... Liev Schreiber carrying his bike into his apartment in NoHo ... Amanda Seyfried shooting scenes for Letters to Juliet in Bryant Park ... Nikki Sixx leaving his hotel ... Blake Lively hailing a cab, and later talking to Sebastian Stan on a Gossip Girl shoot at the Brooklyn Botanical Gardens ... Viola Davis walking in Tribeca ... and Whitney Port going grocery shopping at the Citarella in SoHo.