Korean pop stars Sandara Park and Park Bom kept their promise to release a special performance, following a nixed K-pop festival in the Philippines last month.
Sandara released the video of her duet with Bom on her YouTube channel.
The duo performed "Lonely," one of 2NE1's hit songs released in 2011.
Sandara and Bom, both former members of 2NE1, were supposed to reunite during the cancelled "super concert."
Following 2NE1's disbandment in 2016, both Sandara and Bom continued with their solo careers.
Sandara has been appearing in some shows in South Korea, while Bom released her debut album as a solo act earlier this year.