Snoop Dogg has worked with artists from many genres. However, the "Gin and Juice" rapper seemed worried that appearing on Katy Perry’s “California Gurls” wasn't the best move.
Some people listen to classic rock songs to feel the machismo. However, the best classic rock acts, from The Beatles to U2, know how to make you cry as well.
Some songs that were ignorable in the 1960s became classic rock songs after the fact. For example, Donovan's "Season of the Witch" is more famous now than it ever was.