Vocal R&B duo As One has appeared on the December 13 episode of JTBC's 'Sugarman 3'. 

The duo is known for their beautiful vocals and hit late 90s songs such as "Day by Day". Fans and panelists were delighted to see the talented artists come back to perform on stage. 

Check out their performance below!

Their music video of "Sarang+" from 2001: