Premise: Avenged Sevenfold . Despite his death , Avenged Sevenfold continued on with the help of now-former Dream Theater drummer Mike Portnoy and released and toured in support of its fifth album Nightmare in 2010 , which debuted on the top spot of the Billboard 200 , Avenged Sevenfold 's first number one debut .
Hypothesis: Avenged Sevenfold released studio albums.
Label: ENTAILMENT