Davichi beat out fellow female duo SISTAR19 on weekly music charts with their�new single for the 'IRIS 2' OST,�"Do You Not Know".

Davichi's "Do You Not Know" ranked #1 on Soribada's weekly chart�for the second week in a row. SISTAR19's "Gone Not Around Any Longer" took the #2 spot, while�Rainbow's "Tell Me Tell Me" came in at 3rd.

Other OSTs have also been dominating music charts; the 'Queen of Ambition' OST "I Love You I Hate You" ranked in at 4th, while 'Wind Blows In Winter' OST "Gray Paper" is 6th.

A Soribada representative revealed, "'Do You Not Know' and drama OSTs are both climbing up the chart, and SISTAR19 and Huh Gak's songs are consistently gaining popularity."

Congrats, Davichi!