I Really Don't Hate Christmas

 is sung by Heinz Doofenshmirtz in "Phineas and Ferb Christmas Vacation!" about how he hates the other holidays but he doesn't hate Christmas.

Lyrics
Heinz Doofenshmirtz: You see Valentine's is torture, and my Birthday is a mess,

New Year's is a lot of noise, and Arbor Day's a pest!

Halloween's a horror but I guess I must confess

That I really don't hate Christmas!

You see Flag Day is infernal, April Fool's is just a bore,

Mardi Gras is a waste, unless you own a candy store,

All these other holidays I can admit that I abhor,

But I really don't hate Christmas.

Now, it isn't that I like it, at the most I feel ambivalence,

But should I really just destroy it? I'll admit that I'm still on the fence,

It makes me tense!

From the evil scientists' community I'm sure to get ejected,

But for Christmas I can't seem to summon any true invective,

Because what is there to hate? I mean, it's really so subjective.

No, I really don't hate Christmas.

I hate puppy dogs and kittens, I hate flowers in the spring,

Heck, I even hate the sunshine and the birdies when they sing,

I can work up animosity for almost anything.

Tell me why I don't hate Christmas.

Though my childhood was atrocious, Christmas never was that bad, you see,

So the most that I can muster is complete and total apathy.

What's wrong with me?

How can I prove that I'm an evil villain worth his salt

When with a holiday so jolly I can't even find a fault?

If I didn't feel ambiguous I'd launch a big assault.

But I really don't hate Christmas.

''Oh, what the heck. Kickline!''

No, I really...

No, I really don't hate Christmas!

I have an intense BURNING indifference!

Background Information

 * This song is similar to the chorus of the song I don't like Mondays by the Boomtown Rats.
 * This song is much like "Model Major General" from Gilbert & Sullivan's Pirates of Penzace.
 * When Doofenshmirtz sings that he hates kittens, it's as if they are ignoring his affection for Mr. Fluffypants, the kitten Doofenshmirtz cared for and loved. (Though it is entirely possible that the trouble Mr. Fluffypants put him through has lead to this new-found hatred)
 * The song is similar to It's Been a Charmed Life, My Goody Two-Shoes Brother, and Impress My Professor, Doofenshmirtz even makes a reference to them when he says "Oh, what the heck. Kickline!" because most of these songs have kick lines at the end.
 * When it shows a picture of him and his family, it shows Doofenshmirtz wearing a dress. It must be when he had to wear dresses ("Gaming the System")
 * This song's dancers are similar to the Radio City Rockettes.
 * When Doofenshmirtz is putting on the music, the start sounds like "The Goofy Goober theme song" off from SpongeBob SquarePants.

Songwriters
Swampy Marsh, Martin Olson, Dan Povenmire