Universal’s 2010 collection Icon is an 11-track collection of Nirvana’s hit singles, containing the group’s alternative radio standards -- “Smells Like Teen Spirit,” “Come as You Are,” “In Bloom,” “Lithium,” “Heart-Shaped Box,” “Pennyroyal Tea,” “About A Girl,” an acoustic “All Apologies,” plus the posthumous “You Know You’re Right” - in a concise, enjoyable collection that doesn’t dig deep but does give casual fans what they want.