Fleetwood Mac's recent world tour may be the group's final ride. According to guitarist Lindsey Buckingham, the band is in its "last act." The tour, their first with Christine McVie since 1998, will be accompanied by an album before the artists retire from making music together, The Guardian notes.

The record will be the group's first effort since 2003's Say You Will. Buckingham told PBS that McVie was critical in getting the album kickstarted.

"She gave me a bunch of stuff to take home," he said. "I worked on it, came back, and she loved it. We went into the studio and came out with the best songs we've co-written in years. Christine really fills the gap of the polarity that might exist otherwise, and helps things breathe."

The guitarist wasn't sure about McVie's intentions initially.

"My initial reaction was, 'OK — we have to take this with baby steps.' The want to return doesn't mean you can repeat history; it doesn't mean all the tools, all the reference points are still there for it all to work," he added.

Regardless, it looks like 2015 will be a big year for Fleetwood Mac. Once it's over, the band may be over as well. They have gigs scheduled through July.

"We're going to continue working on the new album, and the solo stuff will take a back seat for a year or two. A beautiful way to wrap up this last act."

Despite being an in-demand act, drummer Mick Fleetwood recently denied that the band will be headlining Glastonbury.

"One of the things that I'd like to clear up is that we're not playing Glastonbury," he said. "A lot of folks think that we are, so loud and clear: We love Glastonbury and all the surrounding history of such a lovely festival but we're not playing it."

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