CAA: Christian Anime Alliance

So what are people's favorite insert songs - or just songs in the soundtrack that play in the background? Just curious.
The only requirements are that they must appear in an episode of an anime, and that they must have words.

For example:

Wolf's Rain - "Tell Me What the Rain Knows"
I can't remember exactly what episode this appears in, but I remember being so captivated by Maaya Sakamoto's voice that I could hardly pay attention to what was happening.

Samurai Champloo - "Obokuri Eemui"
This plays during the part where [spoiler]Mugen almost dies[/spoiler]

FMA (first series) - "Bratya"
My personal favorite, which appears several times over the course of the series in moments of particular strength between the Elric brothers. I first noticed it in Lab 5, but it appears elsewhere as well.

Motteke Sailor Fuku. Opening song for Lucky Star.

"Heaven's Not Enough" (Wolf's Rain)
"Rain" (Cowboy Bebop)
[url=http://www.youtube.com/watch?v=nPbBhvv6GI8]"Call Me Call Me" (Cowboy Bebop)

@the_wolfs_howl: Sakamoto Maaya is awesome. I also second “Bratya,â€

Interesting choices.

I can't figure out the names of the background music in the stuff I like (Note to self: become a better googler)

Mwa ha ha I am going off-topic! DEAL WITH IT.

When you say awesome insert songs, there is one and only one response.

SuperNova. This is the only insert song you need.

Of course, there are other insert songs that are great. For example.

Regret Nothing~Tighten Up~ is pretty sweet. TATOBA, TATOBA!

Ride On Right Time is awesome as well.

Treasure Sniper is another solid choice. KUUGA AGITO RYUKI FAIZ BLADE HIBIKI KABUTO DEN-O KIVA

Of course if you're into hip hop, Climax Jump Hip Hop Version is fantastic. KOTAE WA KIITENAI!

Or if you like more traditional Japanese music, you could always enjoy Double Action Axe Form. His strength has made me cry!

But if you want an insert song that will make you cry for real, Cyclone Joker Acoustic Version. Why would this song make you cry? That's a spoiler.