John Mayer has been hospitalized in New Orleans, Louisiana for an emergency appendectomy.
The Daughters singer was taken to the hospital early on Tuesday (05Dec17), and underwent surgery, according to TMZ.
Mayer had been in New Orleans ahead of a Dead and Company concert at the Smoothie King Center scheduled for Tuesday night..
A statement from the band reads: "Early this morning, Tuesday, December 5th, John Mayer was admitted into the hospital for emergency appendectomy forcing the Dead & Company December 5th concert in New Orleans to be postponed."
Dead & Company have two Florida dates remaining on their current tour - on 7 and 8 December (17). It is not known if those shows will go ahead with or without Mayer.
The 40-year-old singer-songwriter has been touring with the Grateful Dead spin-off band, featuring Bob Weir and Mickey Hart, since 2015. Mayer also has a number of upcoming solo dates scheduled, but it is unclear when he'll be well enough to get back on the road after his health emergency.
He last performed on Saturday night (02Dec17), when Dead & Company hit the stage in Austin, Texas.