As everyone knows, music is not limited to a specific style; after all, we've got rock, rap, hip-hop, jazz, classical, RnB, fusion... The list goes on.

Anyway,this thread is to discuss what the bands/groups/artists that YOU feel define the various genres out there. I'll start:

Rock: The Beatles, The Eagles, Led Zep
Hard rock: Hendrix (duh), Deep Purple, Black Sabbath (the first real heavy metal band), Thin Lizzy
Prog rock: Rush, Dream Theater
"Happy" rock: Foo Fighters
Indie: Franz Ferdinand
Punk: NoFX, Billy Talent
Pop punk: Blink 182, Sum 41, Green Day (their old stuff)
Grunge: Nirvana
Parody rock: Beatallica (a surprisingly good blend of the Beatles and Metallica)
Metal: Judas Priest, Iron Maiden, Megadeth (their new stuff)
Speed metal: Metallica, Megadeth (their old stuff)
Power metal: Firewind (Got to love their cover of "Maniac" from the movie 'Flashdance')
Death Metal: Children of Bodom (Just listen to "Living Dead Beat")

Pop: The Archies (duh...), ABBA

Rap: Eminem
Hip-hop: Akon ("Lonely" makes better use of its sample than Nitty's "Nasty Girl")
RnB (male): Prince
RnB (female): Rihanna

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The thread is now open for discussion...

Pop: Michael Jackson, Madonna, Celine Dion, Mariah Carey, New Kids On the Block
Pop Punk: My Chemical Romance, Fall Out Boy
Hip-Pop (an emerging genre): Keke Palmer
R & B:Usher, Alicia Keys
Hip Hop: Black Eyed Peas
Rap: Shop Boyz, Soulja Boy, Jeezy

I'd never even heard of "Hip-Pop" before,... and "Cow Punk"?? I'm definitely gonna have to check some of that out!

Ditto to that as well.

On that note, don't even ask about mathcore or gore-grind. Heck, post-hardcore and metal have much more subgenres than you can shake a stick at.