Florence and the Machine were forced to cancel two European tour dates this week after singer Florence Welch was advised by doctors to rest her voice.

The shows were at the Benicassim Festival in Spain on Thursday and the Optimus Alive fest in Portugal on Saturday and singer Welch apologized in advance to fans for the no-shows.

"Hello everyone, thank you so much for all your messages of support, yes its true ... it finally happened, I've lost my voice :(," Welch wrote in a note posted on the band's website on Wednesday (July11).

"I've sustained a vocal injury and been told I cannot sing for a week ... seriously I felt something snap, it was very frightening. Unfortunately this means I will not be able to perform at Benicassim and Optimus Alive festival this weekend ... I am so so sorry. I'm so sorry to all the fans, I was desperate to still perform, but was told without question not to, so as not to do permanent damage ... I hope I can make it up to you in the future, have an amazing time .. .yours croakily Florence.

Though the Grammy-nominated band was forced to pull out of those shows, they recently added an extra date to their U.S. tour in support of [article id="1665582"]Ceremonials[/article]
. A show at the Wells Fargo Theater in Denver is slated to take place on July 26 after a gig at the famed Red Rocks Amphitheater on July 25 sold out.

The band's next scheduled date is a July 20 show at Deer Lake Park in Burnaby, British Columbia and as of press time that show was still on.