The Black Eyed Peas star, who is mentor and friend to the 'Call My Name' singer, said he is pleased that Cole has spoken highly of his remaining Voice act Tyler James, as she has the ability to sniff out "the next big thing" in music.
"She thinks Tyler is the favourite," will.i.am told journalists including Digital Spy. "One thing about Cheryl is she has an ear and she knows what's coming.
"She knows exactly the next big thing. I play her the [Black Eyed Peas] record and she'd be like, 'That's your single' and she's been spot on each time.
"She called 'I Got A Feeling', she called 'Boom Boom Pow'. And she called Tyler. She knows, she has that sense."
James himself also praised the former X Factor judge for putting his "head into perspective" during her guest appearance on the show last week.
"When she was here she gave me some really good advice, obviously she's been in this kind of scenario before," he revealed.
"She's like, 'There's a lot of stuff going on and you can get overwhelmed by the fact that people are voting for you and it all becomes pretty messy in your head. Just remember when you get on the stage that this is your dream... just go out there and love the moment you're in and recognise the opportunity'.
"She's an absolute star. She knows all of this, she's brilliant at it. She's a pro. Last week she just got my head into perspective and it did make a difference."
He continued: "I was nervous and it was good for her to just put it in simple terms, because it's really daunting... sometimes you have to go back to that basic place in your head."
The Voice UK airs tonight (June 2) at 7.20pm on BBC One.
Watch Cheryl Cole in the video for 'Call My Name' below: