Little Mix star Jesy Nelson is unwell and was unable to appear on her band's TV talent show final on Saturday night.
The group's publicist announced that she would be absent from the final of Little Mix The Search and will also not appear at the MTV Europe Music Awards on Sunday.
It is not known what is wrong with Nelson or how unwell she is.
On Saturday morning, publicist Simon Jones posted a statement from the group on Twitter which said: "Jesy is unwell and will not be appearing on tonight's final of Little Mix The Search.
"She will also not be hosting or performing at tomorrow's MTV EMAs."
The talent show Little Mix The Search has seen six bands compete for a place on the bill of the Little Mix 2021 tour.
Last month, a live episode of the show was postponed after members of the crew tested positive for Covid-19.
The band - Nelson, Perrie Edwards, Jade Thirlwall, and Leigh-Anne Pinnock - were not among those who tested positive.
Little Mix formed on The X Factor in 2011 and have become one of the UK's biggest-selling girl bands.
They left Simon Cowell's Syco Music for the RCA label in November 2018.
Cowell later launched another version of The X Factor, called The Band, to rival the girl group's Little Mix The Search.