Park Soo-Young (박수영), best known by the stage name Park Soo-ah (박수아; formerly known as Lizzy (리지)) is a South Korean singer and actress currently signed under Celltrion Entertainment. She debuted on March 25th, 2010, with the South Korean K-pop girl group, After School signed under Pledis Entertainment during their third single, "Bang!". She is also a member of After School's sub-unit, Orange Caramel which debuted in June 2010 with the single, "Magic Girl".
On January 23rd, 2015, Lizzy made her solo debut as a singer with the trot song, "Not an Easy Girl" (쉬운 여자 아니에요).
On May 1st, 2018, Pledis Entertainment announced that Lizzy graduated from After School due to the expiration of her contract after eight years of activity. On May 10th, 2018, Lizzy signed with Celltrion Entertainment. The same year in July, it was announced that she changed her promotional name to "Park Soo-ah".