Can you help classify the following artists by genre?

Question

So for example: Weezer - Alt, New Kids on the Block - Pop, etc. Just looking for a second opinion from what I have so far. Thanks!

Scars On Broadway

Weezer

Beck

Tokyo Police Club

Girlicious

Lady Gaga

New Kids on the Block

Keane

Plain White T's

Mobile

Rise Against

3 Doors Down

Sam Roberts

Nas

Hawksley Workman

Hinder

The Killers

Hoobastank

Answer 1

Scars On Broadway;Alternative rock, Experimental rock, Alternative metal

Weezer;Alternative rock,Power pop,Geek rock

Beck;Alternative rock,Indie rock,Lo-fi,Anti-folk,Blues-rock,Alternat... hip-hop

Tokyo Police Club;Indie rock, garage rock, post-punk revival

Girlicious;Pop, dance-pop, R&B, Hip Hop

Lady Gaga;R&B, pop, dance-pop, disco, electronica, house, piano pop

New Kids on the Block;Pop

Keane;Piano rock,Alternative rock

Plain White T's; pop punk band

Mobile;Rock, Alternative rock

Rise Against;Hardcore punk,Melodic hardcore,Punk rock

3 Doors Down;Alternative rock,Pop grunge,Hard rock,Southern rock

Sam Roberts;Rock, Indie Rock

Nas;Hip hop

Hawksley Workman;Cabaret, pop rock, glam rock

Hinder;Hard rock, Pop Metal, Arena rock

The Killers;Alternative rock,Post-punk revival,Indie rock

Hoobastank;Alternative rock,Alternative metal,Post-grunge[1],Hard rock

Funk metal (early)

Rock on!!