Sills's now high-profile career landed her on the cover of "Time" in 1971, where she was described as "America's Queen of Opera". The title was appropriate because Sills had purposely limited her overseas engagements because of her family. Her major overseas appearances include London's Covent Garden, Milan's La Scala, La Fenice in Venice, the Vienna State Opera, the Théâtre de Beaulieu in Lausanne, Switzerland, and concerts in Paris. In South America, she sang in the opera houses of Buenos Aires and Santiago, a concert in Lima, Peru, and appeared in several productions in Mexico City, including "Lucia di Lammermoor" with Luciano Pavarotti. On November 9, 1971, her performance in the New York City Opera's production of "The Golden Cockerel" was telecast live to cable TV subscribers.