Girls' Generation's Yuri revealed that she'd like to write a song specifically for ballad singerSung Si Kyung.

During a recent filming of 'Yoo Hee Yeol's Sketchbook', the nine members of Girls' Generation, who recently returned with "Mr.Mr", discussed their musical aspirations and career. It seems the girls have noticed that a lot of their peers are writing and producing their own songs.

They said, "Most of the members are preparing their own compositions," and Yuri in particular commented, "I want to give a song to Sung Si Kyung because he's very good at expressing emotional lyrics." Sooyoung mentioned that she'd like to write a song forSISTAR as well.

Hyoyeon also revealed, "It took us 3 months to learn the choreography for 'Mr.Mr.', but the elaborate choreography was possible because we have so many members."