What began in a "Beach Chair" will end up in a stadium (three, to be exact). After a couple years of palling around and a couple collaborations, Jay-Z and Coldplay will play a few UK tour dates together next year. The shows don't come until September 2009, but I guess you need to plan that far ahead when you're dealing with dudes this high-profile.Speaking of Jay-Z/Coldplay collaborations, the Jay-Z-enhanced "Lost +" appears on Coldplay's Prospekt's March EP, which is out today (November 24) via Capitol. The EP comes either by itself as a single disc or in a two-disc deluxe edition of Viva La Vida.Coldplay have plenty of tour dates to keep themselves busy, continuing tomorrow (November 25) in Anaheim, California. Jay-Z, on the other hand, is rumored to be one of the performers at Barack Obama's inauguration, along with Beyoncé and Leona Lewis. That would be crazy, but we'll believe it when it's officially announced.read more