Lyric discussion by kateaj 

Cover art for Heavy in Your Arms lyrics by Florence + the Machine

Guys, this song was written for the movie Eclipse, whether you like it or not, LOL. Here is an excerpt of an interview with Florence herself (credit, songfacts.com):

"This dark and moody cut was included on the soundtrack of the third Twilight movie, Eclipse. Florence Welch explained to The Independent June 11, 2010 why she wanted to be involved. "I thought it would be something fun to do; I'd never written a song for a soundtrack before. It's an interesting exercise as a songwriter. You're thinking about it more in a visual tone and imagining a film score, which I think is really exciting. They didn't specifically say what bit of the movie it was going to be in or anything, but they did say it should have nothing about vampires or werewolves in it. I don't think they wanted anything with specific references to the story; it's not a musical, opera type thing — they just wanted something that fitted the emotional tone of it. I just thought about some of the themes in the book and wrote the song." Florence told The Independent that she is a fan of the Twilight books. "My sister and I read them to each other last Christmas. It's pure escapism. We get really excited for the films, they're fun." "

Also- the song was not featured during the actual movie at all. It played as the second song of the ending credits only. (The song playing during the Victoria and Riley scene was "Rolling In on a Burning Tire" by The Dead Weather.)