The 26-year-old remained seated when she sang songs in the album during the event held at the Yes24 Move Hall in Seogyo-dong, Mapo-gu, Seoul, and used crutches to walk.
She had the injury while filming the music video of a new single in Goyang, Gyeonggi Province, Sept. 8.
The album, "VIVID," contains 10 songs, including "Insane," "Letting Go" and "Second Chance."
Ailee has been known for her powerful vocal since her debut in February 2012.
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