AC DC without a shadow of a doubt are more popular than Nickelback ever could be.
ACDC
Both very popular, but ACDC were much more popular for a longer period of time. So ACDC is more popular than Judas Priest.
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Obviously it's ACDC, they've been playing since 1970 and they still rock!!
Both bands are very popular, but ACDC reached the masses more than Megadeth so ACDC wins this one.
Depends on what country you are talking about. UK.. Ramones. US.. ACDC. Both are equally popular in their respective countries.
Acdc. Been around longer and more people like them.