Parody songs that play rent free in your head?

I cant hear American Pie without it turning into Weird Al's The Saga Begins

Easy Mode: Amish Paradise

Hard Mode: Shia LaBeouf

49 times we fought that beast

Your old man and me

Easy: Party in the CIA

Hard: I need a crit (Cantina Thirteen) a parody of simple plan"s I'm just a Kid

Maybe a stretch as it's not parodying a song but parodies Star Wars kinda sorta? Seagulls! (Stop it Now)

Lonely Island has a few (Jack Sparrow) comes to mind but again not a direct parody of a specific song.

Richard Cheese does straight up covers but they are so stylistically different that it's basically a parody. Chop Suey

Then there's the classic comedy music duos: Garfunkel & Oates (Loophole), Flight of the Conchords (Business Time)

Bo Burnham's whole Inside special is fantastic too.

Looks like I'm mostly listing comedy music and not necessarily parodies, but oh well.

The Bad Lip Sync version of Gotye (Kicked Your Monkey And I Used Your Goat) kinda always comes to mind

Nanobot by A Capella Science. The whole channel is pretty good, but this song just shines above the pack. Shivers every time:

https://www.youtube.com/watch?v=ObvxPSQNMGc

I had a friend who sung I Can’t Feel my Face when I’m with you, as I can’t feel my face when I Go POOP and that is all I will ever hear now.

https://youtu.be/PV0_lJpPFOo

As an mtg player these parodies are referenced enough that I think of them instead of the originals:

I've played everything

Asmoranomardicadaistinaculdacar

• Y.O.D.A. - YODA (Weird Al)
• Hello Muddah, Hello Fuddah (Alan Sherman), based on a song from the opera La Gioconda

• Dark Lord Funk
• Pumped Up Kicks (Bardcore)

Union Dixie

Love is A Battlefield literal video is hilarious to me.

https://youtu.be/ca2aSzu_2iA

I am never forget the day I first meet the great Lobachevsky.

He took me by the hand, and beat my head against the wall!

In one word, in one word he told me the secret of success in mathematics:

Plagiarize!

Hey it’s pat finnerty big up my dude

Bo Burnham's Kanye Rant

https://youtu.be/rYy0o-J0x20

Pachelbel Rant by Rob Paravonian

The Ghoul - He got the wrong foot amputated, parody of Come and Play by the Offspring

Zero Wing Rhapsody

I found it (in the mid-2000s as a preteen) before I consciously learned about the original Bohemian Rhapsody, so every time I now hear the latter, my mind immediately goes "what happen, what happen, somebody set up us the bomb, somebody set up us the bomb".

Most of the early Minecraft parodies but Fallen Kingdom is probably pretty high up there

Hoop Shredding Gigolo (pictured above) : https://youtu.be/bpR0bULsl-0&t=787

This is Pat Finnerty's (accurate) take on writing a hit Offspring song.

If its parody songs specifically, then hard mode isn't possible for me

But if comedy music is allowed, much of Ninja Sex Party is on repeat, as well as a bunch of Tim Minchin's work

To the tune of the wanderer

"Well I'm the kinda guy who fucks his mom and dad"

https://m.youtube.com/watch?v=ckSl1teci3E

A weird mix of the Electric Slide and the Hustle. The two songs mix flawlessly into each other.

A random tiny soundcloud account that did a parody of All Star that's about the magical girls anime genre...now I want to find it again.

Firm believer that Molecular Shape of You > Shape of You

That llama llama duck song

Its been getting stuck in my head once a month or so for the past 20 years.

Its not even very funny.

Easy Mode:

Definitely 2 of my favorite Weird Al songs that I don't really hear people ever talk about:

Don't Download This Song, and Virus Alert.

Hard Mode:

I don't listen to non-Weird Al parody songs anymore and haven't since late middle school to early highschool, so I got none in my head anymore.