Create a headshot caricature of Will Smith, focusing on his charismatic smile and prominent cheekbones. Use a pop art style with bright, contrasting colors and bold black outlines to highlight his facial features. The background should be a vibrant, flat color that contrasts with his exaggerated expressions. Employ digital painting techniques to accentuate his iconic smile and expressive eyes, while keeping the lighting flat and uniform to complement the pop art aesthetic.