The Canadian singer will sing two tracks on Saturday, June 22, with one song being made available to watch only on the BBC website.
Brit Awards Critics Choice 2013 winner Tom Odell has also been announced to perform his single 'Another Love' on this Friday's (June 7) Quarter Finals show.
Also performing live this week will be last year's finalists Bo Bruce, Tyler James and Vince Kidd, along with winner Leanne Mitchell. They will each be performing their respective solo singles.
> 'The Voice' UK: Meet the final 12
Leanne Mitchell recently stated that she hasn't spoken to former mentor Sir Tom Jones for several months.
The Voice UK continues on Friday at 7pm on BBC One.