EVANSTON, Illinois, April 18 -- Northwestern University posted the following news release: * * * Grammy winner Karen Slack returns to Bienen School of Music * Soprano Karen Slack leads a vocal master class * Monteverdi's "L'incoronazione di Poppea" feature spring opera * Author Sandra Cisneros and composer Derek Bermel present a first look of their new opera "The House on Mango Street" EVANSTON, Ill. --- Fresh off her 2025 Grammy win, soprano Karen Slack returns to the Henry and Leig  more