Various medical conditions have sidelined Cheap Trick drummer Bun E. Carlos, Melissa Etheridge, and Deftones lead singer Chino Moreno, forcing the postponement of live shows and other appearances.

Various medical conditions have sidelined Cheap Trick drummer Bun E. Carlos, Melissa Etheridge, and Deftones lead singer Chino Moreno, forcing the postponement of live shows and other appearances.

Carlos will undergo a corrective back procedure later this week, forcing him to abandon his seat behind the drums on Cheap Trick's ongoing U.S. tour, which next touches down tomorrow (July 19) in Saratoga, Calif. According to the band's official Web site, Daxx Nielsen -- son of Trick guitarist Rick Nielsen -- will fill in until Carlos is fit to return. Daxx and his brother Miles are members of the band Harmony Riley.

Meanwhile, a bad case of the flu has put Melissa Etheridge on the ropes, forcing the cancellation of all engagements through July 27. The singer/songwriter had several promotional commitments in support of her just released album "Skin" (Island), including book signings and today's scheduled induction into Hollywood's RockWalk. That event has been postponed indefinitely.

As previously reported, Etheridge will kick off a solo U.S. tour with a three-night, Aug. 6-8 stand at Washington, D.C.'s Warner Theatre. The illness has also caused Etheridge to pull out of a pre-tour appearance Sunday at KBCO Boulder, Colo.'s weekend-long World Class RockFest. Jackson Browne has been drafted to fill in at the show.

As reported yesterday, a throat condition has forced Deftones singer Chino Moreno to rest his voice, necessitating the postponement of a Sunday night performance in the band's hometown of Sacramento, Calif. After consulting a Los Angeles-based ear, nose, and throat specialist yesterday (July 17), Moreno's condition led the band to postpone last night's Shoreline Amphitheatre appearance with Godsmack outside of San Francisco.

Diagnosed with severely strained vocal chords, Moreno has been ordered to "rest his voice completely," according to a statement. The singer is said to be "feeling fine, but very frustrated by not being able to get on stage and perform."

A follow-up appointment with the L.A. doctor today will determine whether or not Moreno will be able to perform tomorrow night with the band at the Verizon Wireless Amphitheatre in Irvine, Calif.