JLS star Oritse Williams says it was hard caring for his mother, who has MS, when he was a teenager.
The singer says he cared for her and his younger brothers and sister from the age of 11.
Oritse, who is now 25, says he also finds it hard not being in constant contact with his mum now he is a celebrity.
Radio 1 Stories: Keeping Mum is on Radio 1 tonight (8 October) at 9pm. Tweet @BBCR1 #keepingmum