Tom Waits has postponed his upcoming appearances on Late Show with David Letterman and Late Night with Jimmy Fallon. The songwriter was slated to perform on Late Night with David Letterman on April 24 as well as Late Night with Jimmy Fallon on April 25. He was also planning to use the occasions to both debut songs from his latest solo album Bad As Me. Waits plans to reschedule his appearances at a later date TBA.