Defining music genres of each decade?

Anyway, I will cut decades into the eras because 10 years is way too long to boil down to one "defining genre" (Note this is only based on what you would hear on the radio as big hits, so no progressive rock for the 70s unfortunately).

Mid-50s

- Traditional Pop:


- Rock & Roll:


- Mambo:


Late 50s:

- Rock & Roll:


- Rockabilly:


- Teen Pop:


Early 60s:

- Doo-Wop:


- Brill Building Pop:


- Surf Rock


Mid-60s:

- British Invasion/Beat Music:


- Motown:


- Folk Pop:


Late 60s:

- Psychedelic Rock:


- Bubblegum Pop:


- Sunshine Pop:


Early 70s:

- Bubblegum Pop:


- Soul:


- Glam Rock:


Mid-70s:

- Funk:


- Disco:


- Bubblegum/Glam Pop:


Late 70s:

- Disco:


- Soft Rock:


- Punk/New Wave:


Early 80s:

- Soft Rock:


- Post-Disco:


- New Wave/Synthpop:


Mid-80s:

- New Wave:


- Synthpop:


- Minneapolis Sound:


Late 80s:

- Glam Metal:


- Teen Pop:


- New Jack Swing:


Early 90s:

- New Jack Swing:


- House/Eurodance:


- Grunge:


Mid-90s:

- Alternative Rock:


- Gangsta Rap:


- Contemporary R&B:


Late 90s:

- Teen Pop:


- Bubblegum Dance:


- Glam Rap/R&B:


Early 2000s:

- Urban Pop/R&B:


- Nu Metal:


- Electronica:


Mid-2000s:

- Crunk/Dance-R&B:


- Dance-Pop:


- Emo/Pop-Punk:


Late 2000s:

- Electro-R&B:


- Electropop:


- Snap:


Early 2010s:

- Electropop:


- Electrohouse:


- Dubstep/Brostep:


Mid-2010s:

- Alternative Pop:


- Tropical House:


- Indie Pop:


Late 2010s:

- Trap:


- Cloud Rap/SoundCloud Rap:


- Reggaeton/Latin Pop:

70s: Punk Rock, Disco

80s: New wave, Synthpop, Hair Metal

90s: Grunge, Bubblegum Pop, Gangster Rap, R&B

00s: Bubblegum Pop, Crunk, R&B, Pop Rock, Electropop

10s: Electropop, Dubstep, EDM, Indie pop, EDM-pop, Trap, Mumble Rap

What’s up with the late 80s and all the black and white music videos? Was this a trend at the time?

up into 1990 it was still a trend, it was done to make it look more cinematic 

As somebody who’s a big fan of the genre I’d say it’s definitely more definitive of the 2000s than 90s. I mean, Linkin Park, the biggest band in the genre, and the most popular 2000s band period, didn’t release an album until late 2000.
Pop rock on the other hand isn’t really definitive of any decade, since it’s existed in so many different forms over the years. If there’s any decade I associate it with, it’s the 60s, since, well, that’s pretty much the broadest way to characterize bands like The Beatles and The Who. And then I’d associate it with the 90s, specifically the late 90s. Barenaked Ladies, Third Eye Blind, Goo Goo Dolls, Smash Mouth, Matchbox Twenty, etc.