Not all of their stuff would fall under metal, but what would (like the entire Creatures of the Night or Lick it Up albums) would fall under Pop metal (from my 8 genres listed above)
To clarify, under Pop Metal, I would throw glam, hair, nu-metal and heavier grunge bands (like Alice in Chains). In this case, "pop", in spite of it's negative connotation, does not always have to be negative... it's just the easiest means of classifying these groups
Sorry, Alice In Chains do not belong in "pop metal"
They are in the broad "Just Metal" area with Tool and Pantera