A realistic and natural p

A realistic and natural promotional image for a beauty product trial, featuring a medium close-up shot. The main subject is a young European woman (very beautiful), with fair skin. She is applying color-changing foundation to one cheek (a streak of foundation on her face shows a gradient from white to skin tone), using her fingers. She has a surprised and happy expression. The background is a soft pink, blurred effect. The overall style is realistic and natural, reflecting the aesthetics of a beauty product review. Details: The application marks of the color-changing foundation are natural and clearly visible (the gradient from white to skin tone), the lighting is soft, highlighting the facial makeup, and the image is in ultra-high definition.