Nickel Creek - “Toxic” (live Britney Spears cover).  I’ve already said that Nickel Creek have been a huge fave of mine for their blue-grass meets rock/pop sensibilities.  Well, they’ve broken up <sob>, but this cover is a fitting submission for Cover Song Fridays. If you like blue-grass influenced music, check out ex-Nickel Creek mandolin player Chris Thile’s group Punch Brothers.