Lez Zeppelin lead singer Shannon Conley warms up her vocal chords in a back room before a performance at 'Havana' in New Hope, Pennsylvania, April 5, 2013. The band, formed by guitarist Steph Paynes, performs live shows of Led Zeppelin music and will be touring Europe this summer. Picture taken April 5, 2013. REUTERS/Larry Downing (UNITED STATES - Tags: ENTERTAINMENT SOCIETY)

- UNDATED FILE PHOTO - Chris Barron, the lead singer of the pop group The Spin Doctors, shown here in an undated file photo August 20, has been stricken with a rare paralysis of the vocal chords and doctors fear he may never regain full use of his voice. The band recently released their first studio album in three years, "Here Comes the Bride".

UNDATED FILE PHOTO - Chris Barron, the lead singer of the pop group The Spin Doctors, shown here in an undated file photo August 20, has been stricken with a rare paralysis of the vocal chords and doctors fear he may never regain full use of his voice. The band recently released their first studio album in three years, "Here Comes the Bride".

PM/WS

British pop star Elton John smiles at the audience during his concert in Zurich's almost sold-out Letzigrund stadium June 30. Elton John, who wrote the world-famous song "Candle in the Wind" for Princess Diana, was supposed to go on stage with rock star Billy Joel but Joel had to cancel his appearance at this concert due to asthma and vocal chords problems.

STS/WS

British pop star Elton John applauds the audience during his concert in Zurich's almost sold-out Letzigrund stadium June 30. Elton John, who wrote the world-famous song "Candle in the Wind" for Princess Diana, was supposed to go on stage with rock star Billy Joel but Joel had to cancel his appearance at this concert due to asthma and vocal chords problems.

STS/WS

After months of health problems, it was announced on September 7, 2000 that country singer LeAnn Rimes has the Epstein-Barr virus. Rimes, shown at the World Music Awards in Monte Carlo on May 6, 1998, canceled her 30-date summer tour in June due to a strained vocal chord and has been suffering from severe fatique, a symptom of the virus. The 18-year-old singer said she is planning to treat her illness with plenty of bed rest.

BK/CM