Which Disney film features the song "Let It Go"?

Which Pixar film features a rat who wants to be a chef? Which Pixar film features a robot that cleans up an abandoned Earth? In which Pixar film does an old man tie balloons to his house? Which Pixar film is set around the Mexican holiday Día de los Muertos? Which Disney film features the song "We Don't Talk About Bruno"? Which Disney film features the song "Under the Sea"? Which Disney film features the song "Be Our Guest"? Which Disney film features the song "A Whole New World"?