Lady Gaga bought a top-tier ticket and attended an exclusive Silicon Valley fundraiser at the home of Facebook COO Sheryl Sandberg on Sunday night. Wearing a black, sleeveless lace gown and with her hair piled up, Lady Gaga was 2 feet taller than everyone including Obama, thanks to her super high heels and substantial up-do. Her outfit included a black veil. In recent days Gaga has been saddened and angered by the suicide of 14 year old fan Jamey Rodemeyer, and her choice of attire suggests mourning.