The Black Eyed Peas frontman and Grammy-winning producer - one of the show's four coaches alongside Jessie J, Tom Jones and Danny O'Donoghue - says he was 'blown away' by hopefuls at the 'blind' auditions.
Will commented: "I was looking for something unique in the artist's voice and there haven’t been any shocks at all. I haven’t been disappointed either.
"Truthfully, there has not been a bad act that has come up to audition."
"The thing that has surprised me most about doing this show so far is the standard of the singers. I thought I’d get a couple of good singers on my team, but to have ten incredible singers is just fantastic."
He added: "I have got the winner in my team!"
During the auditions stage, each coach chooses ten acts, who they'll mentor and develop before whittling them down to five in the 'battles' round. The final twenty acts will then compete to impress the public in a series of live shows.
The Voice UK kicks off on March 24th on BBC One.