Utau Hoshina from Shugo Chara
In the episode entitled "Utau Hoshina! New Beginning!," Amu and her Guardian Characters are watching Utau sing on television when El shows up. She tells them that Utau needs more people to go to her concert so she can get popular again. Amu shows up, but Utau won't listen to her. Amu decides to try and bring Ikuto there. Utau begs Amu, and Amu finds Ikuto. Eventually, they get many people to come. Utau sings "Heartful Song," and is still sad that Ikuto couldn't come until she sees Ikuto. She smiles and continues to sing. Amu spots Ikuto and tries to catch up with him, but he leaves before she could thank him. Ikuto smiles because he heard Utau sing.