She only does it this way nowadays. Back when the track was first produced, and during all her old live performances, she is using a harmonizer via MIDI control
Ending AND THE WHOLE video is worth it. what ears! I thought it was THREE Vocals. and your voice was the whole talent! not surprised if you Did or didn't use the talk box that was said to be used in the song! 💯💯💯 you took me back just like the song!
Very good, but not accurate. The harmonizer Imogen used can only create a max of 4-voice polyphony, and there's only a single, continuous take in the track, no layering. If you count her raw vocal, which is mixed about 50/50 with the harmonizer signal, then it's 5-voice polyphony