Robert Plant predicted that a celebration to mark the 50th anniversary of Led Zeppelin would take place “somewhere” and that the surviving members were planning to gather to discuss what might be done during the year.

Plant, Jimmy Page and John Paul Jones have already announced a collaborative photo book, while guitarist Page recently said that a new live album is in the works.

“We're planning to get together and talk about it,” Plant told The Current when asked about anniversary plans recently. “Basically, it's very difficult to find stuff that still is unheard. … And the great thing about Led Zeppelin was that we didn't chronicle ourselves. We just kind of went from town to town and sang songs and played guitars and stuff. And then went about our lives."

He added that he "wished that we had more stuff to look at, but there will be a book of photographs and stuff. But some of it will be particularly interesting, I think. Beyond that, musically, there's bits and pieces lying around, but not an album or anything like that. But there will be a celebration, I'm sure, somewhere. A cork will pop!”

The singer is currently touring in support of his latest album, Carry Fire, which features Chrissie Hynde singing on a cover of the 1958 song "Bluebirds Over the Mountain." “We finished our U.K. tour at the Royal Albert Hall, and she came on and sang it, and I murdered her song ‘2000 Miles,’ because it was Christmas," Plant recalled.

"I really wanted to do it, but it's a tough song. It's a kind of waltz time. I was practicing it in the car. We got to the sound check before the doors were opened at the Royal Albert Hall in London and … you know, I was all over the shop — terrible! And she kept looking at me and conducting me. So when we came to play in front of a full house of cheering people, for a guy who's been around as long as me, I found it very comical to be conducted by her to make sure I came in at the right place in the song. It was very funny!”

Plant’s world tour takes him to Australia this month, followed by dates in the U.K. and Europe.