Tom Parker of The Wanted scoffed at “selfish” petrol buyers saying they might not be able to make hospital appointments.
The 33-year-old singer, who was diagnosed with stage four glioblastoma last October, expressed anger at nationwide queues at pumps due to fuel shortages.
He said: “There is a hole in there for all of you selfish people who are stealing all the petrol.
“I’ve had a real meeting to take my medicine, so can we think of others in front of us?”
Tom also claimed that the crisis was “the best scenario for fuel companies” and accused it of allowing them to sell fuel closer to its deadline, although there was no evidence.
When stored in a sealed container at a maximum temperature of 20 degrees Celsius, the shelf life of gasoline is about six months.
The crisis is the result of a shortage of HGV drivers, which affects the supply chain to stations across the country.
A relatively small number of stations were initially affected, but large-scale panic purchases led to further shortages.
Meanwhile, Tom’s wife, Kelsey, recently told The Sun that Tom’s diagnosis is looking more positive and that they are also talking about having a baby with their daughter, Aurelia, two, and 11-month-old son, Bodhi.
She said: “I’ve always wanted four kids so I think we’ll try again in a year or two. During that time the kids have been a saving grace for us. Are
Tom, 33, was in tears last week when he took to the stage with his band at the Royal Albert Hall for the first time in seven years, his earnings on cancer and the National Brain Appeal.
Looking healthy for months, he said to the cheerful crowd: “I want to thank you from the bottom of my heart.”
Tom then left Kelsey alone, who was by his side in the darkest days, telling him: “I love you so much.
“You’ve been my rock and I don’t know what I would have done without you.”