Guns N' Roses were/are a pop band too, just with a hard rock core, if you like. Its evolution, you dont have to sound like the music your influenced by, Led Zeppelin were influenced mainly by old blues artists, but they(some say) invented heavy metal, you get it?
At the end of the day, my opinion is, the Beatles wrote better songs than everyone else and thats why theyve been so successful.
www.gnr.com.ar
http://www.izzystradlin.tk/
http://www.izzystradlin.tk/