Salma Hayek has kept a relatively low profile since having a child with (and eventually marrying) French billionaire Francois-Henri Pinault, so she had lots to discuss with David Letterman when she stopped by tonight's Late Show to promote her new film. Here are highlights of their lively chat, including her struggle to quit smoking, her four-year-old daughter's adult-like attitude, and Letterman's obsession with Hayek's earrings.