Categorize these bands as either 'rock', 'pop', 'metal' or 'indie'. Metallica, Queen, One direction, Korn, Coldplay, Arcade fire, backstreet boys
metal: Metallica, Korn
rock: Queen, Coldplay
pop: One direction, backstreet boys
indie: Arcade fire
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Categorize these bands as either 'rock', 'pop', 'metal' or 'indie'. Metallica, Queen, One direction, Korn, Coldplay, Arcade fire, backstreet boys
### Input: 
### Response: metal: Metallica, Korn
rock: Queen, Coldplay
pop: One direction, backstreet boys
indie: Arcade fire