Music news magazine NME has confirmed that The National will be included on the Catching Fire soundtrack. The original title of the song? "Dying is Easy." It was deemed "too dark," however, and renamed "Lean" by the producers.
"The song was originally called 'Dying Is Easy' and I think that they thought it was a little too dark. But, you know, I get it. It was a really fun project…It was a cool change from how we normally work on things – to write something for something else. It was kind of a pressure release thing and it was fun, we really enjoyed it."
Source: http://www.nme.com/news/the-national/72808#lZJPob3v1iG1c8yc.99