Two giants of Seventies rock — the Eagles and Fleetwood Mac — are planning a joint tour for next summer. The outing will hit stadiums and arenas, and will include multinight stands in some markets. "Any time you have two stars on a package, it becomes a bigger evening," says Billy Joel's booking agent Dennis Arfa of Artist Group International. "The problem is that when you go into stadiums, it's harder to sell to the baby-boomer audience." Both groups have toured extensively in recent years; Fleetwood Mac hit the road in 2009, without a new album to support, and grossed $63 million over 59 shows. Touring behind 2007's Long Road Out of Eden, the Eagles grossed $57 million over 50 nights in 2008.
This story is from the January 21, 2010 issue of Rolling Stone.