"Grenade" by Bruno Mars

Sam Stander's life began with this song, and you can even hear it on his family's outgoing voicemail message.

Judith Seeger, from Mountain View, made mix tapes for almost 40 years, starting in the late '60s. She always filled the remaining few seconds of the cassettes with Jefferson Airplane's "Embryonic Journey." 

For Hannah Lew of San Francisco, this song proved the perfect soundtrack to one of her favorite stories by Italo Calvino.