Lenne, the songstress', hit song in Zanarkand. When Leblanc steals Yuna's Garmentgrid, she is able to take on Yuna's FFX outfit and spherechange into Yuna's FFX-2 songstress dressphere. This is actually the opening FMV to the game with a concert held in Luca stadium. This is the only song known to be sung by Lenne while alive.
The world of real Emotion has surrounded me
Japanese: Kumi Koda, who also did the dance movements for Yuna
FFX-2 International + Last Mission & North American FFX-2: Jade from Sweetbox