Glee - Previously Denied Song Will Appear

According to the Ultimate Gleeks twitter (reliable in the past), Glee will be performing a song previously denied to them. It's been no secret that some bands think they're above having their songs covered by a tv show and have denied the rights to their songs to Ryan Murphy.

Who do you think it is? I don't think it'll be Kings of Leon or The Foo Fighters. My money is on Coldplay.