Niall Horan is suffering from a chest infection following an evening out with Ariana Grande and friends.
The One Direction star attended the birthday celebration of Alfredo Flores - a close pal of both him and the 'Love Me Harder' hitmaker - in Barcelona on Monday night (15.06.15).
On Tuesday (16.05.15) Niall has taken to Twitter to moan about his cough and said he would be having " a day in bed" following his boozy evening.
He posted a photo on Instagram with a picture of Alfredo, himself and friends drinking from wine and champagne glasses, along with the caption: "Only way to celebrate @alfredoflores is the king (sic)!"
Hours later he posted on Twitter a series of tweets about contracting a chest infection.
He posted: "Oh Hello chest infection! ... Well that was fun! thank you horsens ... It was soo fkn cold out there , I think it's a day in bed for me tomorrow ! Night night people xx ... Cough cough fkn cough (sic)"
The 21-year-old singer's bandmate Louis Tomlinson replied to his tweet teasing Niall.
He wrote: "@NiallOfficial too much partying young Niall (sic)!!"
To which the Irishman responded: "@Louis_Tomlinson all good on the hangover side , just chest is in bits (sic)"