It's been claimed their busy work schedules have put a strain on their relationship.
And just 24 hours after Liam Payne made a loved-up red carpet appearance with girlfriend Cheryl at the BRIT Awards, the singer revealed he had jet off again on Thursday night as he shared a video from the balmy climes of Miami.
Letting his fans know that he had flown Stateside to shoot a new music video, the 24-year-old posted a clip of himself riding in a taxi on his Instagram story.
He enthused: 'Just landed here in Miami, and we have Michael Jackson on the radio which is always nice.
'It's sunny outside and I've got a cardigan on, which all makes perfect sense. Music video time.'
The timing of his trip will no doubt spur rumours that his relationship with Cheryl is in crisis, with sources telling The Sun that the pair could split in 'a matter of weeks.'
The couple attempted to downplay the allegations when they put on an overzealous display at the BRIT Awards on Wednesday, though insiders have branded the whole thing a 'stunt'.
A source told the publication: 'Cheryl and Liam's friends say things aren't good between them and have made it clear their relationship will soon end.
'But with a single to promote, Liam was not going to miss the opportunity, and having Cheryl with him gives him even more limelight.
'They are trying to work things out and want to be together for their son Bear's first birthday next month. But things are very strained.'
Despite the claims, Cheryl took to Twitter to defend her relationship with Liam on Thursday and denied that they were on the brink of a break-up.
Posting to her 6.4million followers, she wrote: 'Oh stop no one cares who’s been speculatively arguing or not in their relationship use your platform to put something productive in your columns.
'I opened a centre this week that could help thousands of youth!!!!'
She added: '...Oh and your "stunt" theories are just ludicrous and a bit weird'.
While Liam gallivants across the globe to promote his new music, Cheryl is thought to be spending much of her time at home on her own with their son Bear, because she would rather stay in watching TV than go out to showbiz parties.
