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 girl group, After School signed under Pledis Entertainment during their third single, "Bang!".
On June 17th, 2010, Lizzy debuted in After School's sub-unit, Orange Caramel signed under Pledis Entertainment. On July 20th, 2011, she joined After School's other sub-unit, A.S. Blue also signed under Pledis Entertainment.
On May 1st, 2018, Pledis Entertainment announced that Lizzy's contract expired after deciding not to renew so she can pursue her dreams through various pursuits. It was also stated that she would be graduating from After School.
On May 10th, 2018, Lizzy joined Celltrion Entertainment. The same year in July, it was announced that Lizzy had changed her promotional name to 'Park Soo-ah'.