Tā qǐng huàjiā wèi zìjǐ huà le yī fú xiàoxiàng huà.
She commissioned a painter to do a portrait of her.
Tips
usage
肖像画 refers specifically to painted portraits. For photographic portraits, 肖像照 is used. 肖像权 (portrait rights) is a legal concept protecting a person's likeness in China.