By Enrique Lopetegui elopetegui@sacurrent.com Since February 2010, 18-year-old Jennifer Espinoza (a student at the San Antonio School for Inquiry and Creativity) sings and plays bass at the Latin stage of Six Flags, but all that could change quickly: she’s one of two singers selected for The Queen Extravaganza Tour, a superproduction that will feature a […]