However , on the EMI label she made several `` champagne operetta '' recordings like Franz Lehár 's `` The Merry Widow '' and Johann Strauss II 's `` The Gypsy Baron '' .
On the EMI label she made several `` champagne operetta '' recordings like Franz Lehár 's `` The Merry Widow '' and Johann Strauss II 's `` The Gypsy Baron '' .