One Direction star Niall Horan has suggested he's battling pneumonia.
The singer, 23, initially said he had a chest infection.
Ashton Irwin, from the band 5 Seconds of Summer, joked that they both had the illness after kissing:
But poor Niall later tweeted to say he'd been wrong about the chest infection, adding: "It's worse."
He suggested he had pneumonia - and should have taken heed of his mum's warnings.
The Irish star, who recently launched his debut solo single This Town, will be hoping he gets better before New Year's Eve, when he's set to perform in Los Angeles.