Leni Klum stunned onlookers on Thursday night as she arrived at an event in West Hollywood for the Italian luxury brand Valentino.The daughter of Heidi Klum, 18, stepped out in a fitted black off-the-shoulder dress that flattered her slender frame.She strolled the sidewalk in sky-high nude heels. Stunning: Leni Klum stunned onlookers on Thursday night as she arrived at an event in West Hollywood for the Italian luxury brand ValentinoTo give the look a pop of color, Leni painted her nails a bright red.Her golden blonde hair was worn in a chic bun and she accessorized with sparkly diamond studs.