Black Eyed Peas star admits her relies on autotune.
Will.i.am has admitted that he is not a good singer.
The 37-year-old said: ''I'm working on my singing abilities. I like staying in the studio. The computer allows me to make music, sing it myself, and not wait around for a singer to come along and sing the songs.
''The computer allows me to execute a lot of my ideas at the speed that I think them so that's why I lean to the autotune.''
He added: ''It's a rare combination to have someone who can write songs and sing well.''
'The Voice' mentor also denied the UK show's ratings were in decline, despite figures showing they have almost halved from more than 10 million viewers to an average 5.6 million since it launched.
He insisted: ''I checked Wikipedia once and it said I was one million years old, so you can't always believe what you read.''
An insider told the Mirror: ''One of the coaches is calling in a favour to get a megastar for the end of the series.
''There's a lot riding on 'The Voice' for the BBC's top brass and they are determined not to let it fail.''