My Best Friends In The World is my overall favorite song in Adventure Time!
Besides that I also love I'm Just Your Problem and All Gummed/Warmed Up Inside.

This was the first episode i have ever seen in adventure time so basically this is my all time favorite.

i like it cause it has almost everybody singing it.

I think its one of the best songs but my favorite song is the fry song.

@pbadventure It has Bubbline content, and I thought your favorite episode would be Too Young. :/

The first episode I watched I think it was either The Pods or Evicted!

@Templar Em
First ep I watched "Blood under the Skin"... D: (Lol'd for 1 straight hour just because of Finn being embarrased)

Dat other song made BubbleLine fans rejoice (and that exact time... I was being liberal.)

But, Jeremy Shada singing in a normal voice made me happy and sad:
:D side: I FINALLY GOT TO HEAR YOUR SINGING VOICE AGAIN AFTER A LONG TIME!
D: side: Awgh, why no autotune?
(You sound like Somedaydream XC)

first episode i saw was the enchiridion

^ yeah me too. :D