The comic had received the Johnson and Johnson vaccine.
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The actress is an ambassador for the Alzheimer’s Society.
The show returned with 15 new celebrity contestants.
The pop superstar is living in the US following her divorce from charity boss Simon Konecki.
The 51-year-old broadcaster said she would have surgery next month in order to remove a six centimetre tumour from her left breast.
Tabitha Rubens, from London, is nominated for a second time.
The broadcaster has dismissed as ‘incorrect’ claims key people were not interviewed in a 2004 investigation.
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Martin Bashir was given the clothes for DNA testing, but they were never returned.
This year’s headliners include Snow Patrol and Duran Duran.
The rock frontman compared himself to the late The Who drummer Keith Moon.
There were also performances from the starry cohort.
The 15 celebrities were partnered up during Saturday’s launch show.
The show is returning to BBC One.
The 34-year-old boxer alleged he had been ‘banned’ by American Airlines.
