Ever wonder who your favorite rock and metal musicians hang out with aside from their bandmates and families?

Some of them inevitably form close kinships with those in their own camp, of course, but that's not always the case. Some band relationships are lifelong friendships, others are strictly business.

Foo Fighters' Dave Grohl and Taylor Hawkins are still very close to this day. But did you know Black Sabbath's Tony Iommi and Queen's Brian May consider each other best friends? What about Marilyn Manson and Johnny Depp?

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Scroll through the images below to see 15 sets of rock and metal BFFs.

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