Rock band Live have been forced to postpone two shows due to an upper respiratory infection suffered by singer Ed Kowalczyk, according to a statement issued by the band. The rockers were scheduled to perform Dec. 30 in Asbury Park, N.J., and on New Year's Eve in Hershey Park, Pa. The Hershey Park show will be made up Feb. 4, and the Asbury Park show will be made up Feb. 8. Kowalczyk has been ordered by doctors not to perform or speak for four to six weeks. The infection caused the band to cancel an appearance on the "Late Show With David Letterman" earlier this month. Live released their fourth album, The Distance to Here, in October.