Yes to promote her (pretty good) "Tattoo You" type album from 2014 with none other than Waddy Wachtel as her musical director again. I understand the need for her to do solo stuff (she explains that well in her latest RS interview) but it would be a pity if that means a Fleetwood Mac album without her!
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IORR Links : Essential Studio Outtakes CDs : Audio - History of Rarest Outtakes : Audio