In her fourth and final blog post, Buzzworthy guest blogger Colbie Caillat makes a departure from the crush fodder of songs like "Realize" and "Bubbly" and takes a political stance on her song "Battle." And five years into the war in Iraq, Colbie's message is still, unfortunately, more relevant than ever.

Read about what inspired Colbie to write "Battle," and see how presidential hopefuls Barack Obama and Hillary Clinton are connecting with young voters -- and veterans -- at think.mtv.com.

I wrote "Battle" about my frustration with our government and politics, my opinion on the war, and about people and the hurt and harm they can cause when they get too wrapped up in their own agenda. About wondering how they could feel no remorse, and why instead of owning up to their mistakes and doing what is right, they continue full force on the same path, refusing to take the necessary steps to begin to make things better again, and telling twisted stories and imposing fear along the way to gain supporters on their side that never even heard the truth.

The chorus of the song goes:

"This is a battle, and it's your final last call. It was a trial, you made a mistake, we know. But why aren't you sorry? Why aren't you sorry, why? Things can be better, we can be happy, try!" Meaning ... yes, we know you made a mistake, we all make mistakes, maybe you didn't know any better at the time, but why aren't you sorry, and why wont you make the changes to make things better?!!

Read more Buzzworthy posts by Colbie:

"Realize" | "Bubbly" | "One Fine Wire"