My Chemical Romance + Katy Perry Mashup Makes Mourning UpbeatMy Chemical Romance + Katy Perry Mashup Makes Mourning UpbeatTwo sorrowful songs are now seemingly upbeat after getting the mashup treatment.Chad ChildersChad Childers
Avenged7X + Katy PerryAvenged7X + Katy PerryThe latest mashup from YouTube user Isosine is a brilliant collision of worlds between Avenged Sevenfold and Katy Perry. Jeff CornellJeff Cornell