Former Girls Aloud singer Sarah Harding has become the sixth contestant to drop out of Channel 4 series The Jump because of injury.
The 34-year-old said she had "no choice" but to leave the reality skiing show because of a ligament injury.
Britain's most successful gymnast Tweddle, 30, needed neck surgery following a fall during training
Former Olympic swimming champion Rebecca Adlington, 26, withdrew after dislocating her shoulder
Holby City actress Hobley, 44, also headed for the exit after she dislocated her elbow and suffered two fractures to her arm
Made In Chelsea star Mark-Francis Vandelli, 26, pulled out after fracturing his ankle
1992 Olympic 100m champion Linford Christie pulled out after he failed to recover in time from a hamstring injury
Former England rugby player Ben Cohen, 37, who was drafted in as some of the stars were forced to drop out, was also injured after he said he had used his face to stop himself in an accident. He lost two teeth and needed 20 stitches, he said on Twitter, but will remain in the competition.