Jessica Simpson Loses Her Voice
updated 08/29/2006 AT 01:05 PM EDT
•originally published 08/29/2006 AT 10:25 AM EDT
Today host Matt Lauer announced on the air that Simpson's live concert in New York City's Rockefeller Plaza had been re-scheduled for Friday. However, Simpson is expected to stop by the NBC morning show on Wednesday for a brief appearance, PEOPLE has learned.
Simpson's rep, Rob Shuter, tells PEOPLE that the singer, 26, will appear as scheduled Tuesday afternoon on MTV's Total Request Live. "She will stop by and make an appearance, she just can't perform," he says. She has postponed a scheduled appearance on the Late Show with David Letterman.
"Jessica has lost her voice on the eve of her album release," Shuter tells PEOPLE. "We hope she can recover. The timing could not have been worse."
A source close to Simpson tells PEOPLE that the singer visited doctors on Monday. "If she does not observe vocal rest, she could lose her voice forever," the source says. "Her party is (Tuesday) night. If she goes to the party, she won't be able to talk."
Simpson's album, her first since her divorce from Nick Lachey, is also her first with Epic Records. She was previously on Columbia Records.