SISTAR Soyoo and rapper Mad Clown's duet song, "Stupid in Love" has ranked number 1 for 7 days in a row.

On September 10, they released their song and ranked number 1 on various music sites. Many are curious to see how much longer they will keep the number 1 spot.

Their rival on the charts is Yoon Mi Rae with her OST for the drama, "The Master of the Sun.

Ailee's recent song release is another rival as well with her duet song with pianist Yiruma.