Can you help me 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-alt. metal

Weezer-alt. rock

beck-Indie rock; alt. rock, blues rock

Tokyo Police Club-indie rock, garage rock

Girlicious-pop, dance-pop

Lady Gaga-dance pop, pop, electronica,

New Kids on the Block-pop, boy band

Keane-alt. rock, piano rock

Mobile-alt. rock

Plain White T's-indie rock

Rise Against-punk, punk rock, hardcore punk

3 Doors Down-alt. rock, post-grunge

Sam Roberts-indie rock

Nas-hip hop

Hinder-alt. rock, hard rock, pop metal

The Killers-alt. rock, indie rock

Hoobastank-alt. rock, post-grunge

Hawksley Workman-Cabaret, pop rock

Answer 2

Scars On Broadway    (NHOT)

Weezer                       (ROCK)

Beck                           (ACOUSTIC?)

Tokyo Police Club         (NEVER HERD OF THEM)

Girlicious                       (r&B)

Lady Gaga                      (HIP HOP)

New Kids on the Block      (POP)

Keane                               (NHOT)

Plain White T's                    (ACOUSTIC)

Mobile                                  (NHOT)

Rise Against                           (NHOT)

3 Doors Down                           (ROCK)

Sam Roberts                              (NHOT)

Nas                                             (RAP)

Hawksley Workman                        (NHOT)

Hinder                                             (SOFT ROCK)

The Killers                                        (SOFT ROCK)

Hoobastank                                        (SOFT ROCK)

**NHOT = Never Heard Of Them