Ear Worm: Sonic the Hedgehog
- The theme from Metropolis Zone in Sonic the Hedgehog 2.
- Mystic Cave Zone.
- The Chemical Plant Zone. The Rock Remix version is one better!
- Ice Cap Zone!
- Mushroom Hill from the second half of Sonic 3 & Knuckles is VERY catchy. Then they remixed it for Sonic Generations, and the result will stay in your head forever. You've been warned.
- The Casino Night Zone theme is annoyingly addictive, and only mitigated by the fact that it makes for easy listening.
- Hill Top Zone is also incredibly catchy.
- The Sonic 2 boss music. It gets a faster remix in Sonic 3 & Knuckles, and stays ear-wormy.
- Just a few from Sonic Unleashed: Dragon Road Day, both Jungle Joyride tracks, and Eggmanland Night. And the standard battle theme when it's time to brawl.
- Sonic Rush. Hideki Naganuma, of Jet (Set/Grind) Radio fame, made this game's music. Vela Nova Part 2 will invade your mind.
- Lava Reef Zone, particularly the extended OST version.
- The ''Egg Albatross'' theme, gentlemen.
- And let's not forget Sonic's first song, "Green Hill Zone".
- From Generations the Classic remixes of Crisis City and Speed Highway will be stuck in your head for a long time.
- Many songs with lyrics from Sonic the Hedgehog:
- Follow me, set me free, trust me and we will escape from the city, I'll make it through, prove it to you, follow me...
- This is especially true after listening to some Grumpy Gamers singing this song, along with several parodies of it.
- Sonic Boom, Sonic Boom, Sonic Boom.
- Live and learn! Hanging on the edge of tomorrow!
- Let me show you just... What I'm made of!
- They call me Sonic, 'cause I am faster than sound...
- I am all of me! (I AM!) I am all of me! (I AM!)... Sure, the game it comes from wasn't the best, but you can't deny that song is pretty badass and catchy to boot.
- I am the Eggman, that's what I am, I am the Eggman, I've got the master plan... (not to be confused with a certain Beatles song)
- Even more catchy is the remix from Shadow the Hedgehog.
- I see it, I see it, and now it's all within my reach (Endless Possibility)....
- When you leap without a net you'll find it won't be there all the time! So watch your step now, watch your step, don't fall!
- 'Cause every night I will save your life, and every night I will be with you...
- Some of the songs from Sonic R: for example Super Sonic Racing.
- Team Chaotix's theme. All together now: TEAM CHAOTIX! They're detectives you want on your side! TEAM CHAOTIX! Their directive's trackin' down your crime ... come along for the ride, the truth can run but not hide... for long! The game is on... NOW!!
- The Sonic Heroes theme. What comes up must come down...
- Any of the songs with lyrics in .
- Open Your Heart and It Doesn't Matter.
- Although not from a game, Sonic Youth by Crush 40.
- The Chao Race and Garden are particularly insidious ear worms, especially the "Challenge Race", and especially the freaking "Normal Chao Garden".
- Sonic the Hedgehog 4 had to have the Lost Labyrinth Zone 1 song just so it should play it in your head.
- Sonic Colors has Starlight Carnival map theme.
- Might fit under Shout-Out, but some say that one of the Town Mission songs in Sonic the Hedgehog (2006) sounds vaguely like Flashman's Theme, of Mega Man 2.
- An old album simply titled Sonic the Hedgehog had a ton of these. Listen to them once, they will NEVER leave. Ding ding ding, get the ring ring ring...