The Canadian singer, who is working on a new album, was out of the recording studio for six years until her return in 2011.
Fleetwood Mac have had to cancel tonight's Manchester Arena gig due to illness.
No news has been released of which member has been taken ill, but it's the second gig in a week the Mac have cancelled after Birmingham on Wednesday. The On With the Show tour has not, as yet, been rescheduled for Manchester.
"We are very sorry to announce that tonight’s Fleetwood Mac ‘On With The Show’ tour date in Manchester has been cancelled due to illness," said the tour promoter. "Refunds for tonight’s cancelled date in Manchester will be issued automatically within 14 days.
"The 1 July show will go ahead as planned. Should you need any further assistance, please contact your ticket seller directly."
The band are still scheduled to headline Isle of Wight Festival this weekend on Sunday.