f(x) member Krystal revealed her wishes for a duet with her sister, Girls Generation's Jessica.

The members of f(x) were recent guests on MBC FM's 'Younha's Starry Night' and on the show, they were asked who they wanted to have a duet with.

Krystal answered, "I want to have a duet with my sister (Jessica) once," and added, "During the SMTOWN concerts, we performed a collaboration together on stage. It's really fun. It's fun and interesting to be on the same stage with my sister. So I want to have a duet with her."

Meanwhile, Luna picked SHINee's Onew and said, "Onew and I work well together so I want to do have a duet with him."

Fancam of Jessica & Krystal performing Ke$ha's "Tik Tok" at the 2010 SMTOWN concert in Los Angeles:



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