Singer fends off competition from Grimes, Drake and Fucked Up to take the award
Metallers have put their own spin on 'A Commotion', with Feist covering 'Black Tongue'
Adele also adds to her never ending honours for '21'
The 'Metals' singer will appear with M Ward at London's Royal Albert Hall on March 25
The Walkmen, Slow Club and The Felice Brothers are also confirmed for the Welsh event