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 likes 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.
 * 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. Fluffypant's put him through has lead to this new-found hatred)
 * The song is similar to It's Been a Charmed Life and My Goody Two-Shoes Brother, Doofenshmirtz even makes a reference to them when he says "Oh, what the heck. Kickline!" because both those 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)