This definitely isn’t Lily Valley. The cutie mark’s wrong, the flower in her mane’s wrong, and her mane and tail styles are wrong. Lily Valley has 3 flowers for her cutie mark which also have a different design than the one shown here, the flower in her mane (which does match the one on her cutie mark here) would match her proper cutie mark, and he mane and tail have slight curves outward at the tips, excluding the top of her mane, which is done properly here.