The Wanted's Nathan Sykes apparently had difficulties recording Walks Like Rihanna.
The boyband today unveiled Walks Like Rihanna, the last song Nathan was able to do before undergoing emergency surgery on his vocal cords.
While the operation last week went well, the "haemorrhaging nodule" caused the singer many problems and will leave him without a voice for at least a month.
"You can obviously hear in his voice something is difficult," band member Siva Kaneswaran told the BBC.
"All the other tracks we did after [Walks Like Rihanna] he wasn't able to record and it's been quite difficult for him. What else can we do? You can't just click your fingers and bring the voice back, you got to just work with it. Our love goes with him and hopefully he will recover."
Siva and bandmates Max George, Jay McGuiness and Tom Parker have decided to carry on without Nathan for now and even have a tour coming up.
Nathan's future in the band remains uncertain and the condition could force the 20-year-old to give up his music career completely.
"It takes a long time for the vocal cords to heal properly. If it doesn't heal in a certain way, it's going to take a lot longer," Siva explained.
"He might not be able to sing at all, who knows? You've just got to wait and see."
The remaining band members played their first concert without Nathan in New York City last week and are also working on their third album.
Walks Like Rihanna has been described by fans as "beautiful" and "perfect" on Twitter and is due for release in June.
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