Kate Moss  was surrounded by family and friends at the launch of her second capsule collection for Topshop  in London on Tuesday. The supermodel flashed a giant grin as she took the stage with her longtime friend Nick Grimshaw, a British radio personality, to address the crowd of excited shoppers  before posing with brand CEO Sir Philip Green and his daughter, Chloe. Also on hand for Kate's big day was her mom, Linda, as well as her half-sister, Lottie; the 16-year old stunner is already following in her famous sibling's footsteps, posing for Dazed and Confused and W  and sitting front row at London Fashion Week. Sienna Miller  also popped up at the launch and flashed her engagement ring while sipping Champagne with Linda. Later in the evening, Kate was the belle of the ball at a private global launch dinner that brought out Stella and Mary McCartney, Cara Delevingne, Suki Waterhouse, and Naomi Campbell . The model and designer changed into a silver gown for the bash and posed for sweet photos with her husband, rocker Jamie Hince.