According to a statement from Carnegie, Lieberson will not be appearing at all for the next few months. Lieberson "has been advised by her doctors to take a complete rest from engagements for the next few months in order to ensure a complete recovery," the statement read.
Lieberson was to have been accompanied by pianist Robert Tweten in the May 8 recital. The program had not been announced.
According to a representative of the singer, Lieberson has canceled her U.S. recital tour, which also included recitals with Tweten at the University of Chicago on April 22 and the Kennedy Center on May 3. But she plans to appear at engagements later in the spring, including concerts with the Los Angeles Philharmonic from May 21 to 23 at which she is to sing her husband Peter Lieberson's Neruda Songs.