SNSD's Jessica recently recorded an episode of '1000 Songs Challenge', where she revealed that a certain song had made her cry as a trainee. '1000 Songs Challenge' had asked its guests to perform a song expressing the emotions that they've kept bottled up inside. Jessica stated, "Usually I don't cry while listening to music, but I sobbed listening to this song during my difficult trainee days." As Jessica sang the song, fellow members Sunny and Sooyoung had tears in their eyes as they thought of their own trainee days. But it wasn't all tears at the studio that day. Sunny later sang "To J" as her challenge song, and Jessica claimed that she was "J", causing everyone in the studio to laugh at her wit. Jessica's mysterious song will be revealed on November 20th's episode of '1000 Songs Challenge'. Source + Photo: Newsen via Nate