Justin Bieber's fashion sense has often been questioned, but it seems his latest accessory has particularly raised some eyebrows.

The singer was snapped out shopping in London on Monday (February 25) wearing a black gas mask.

It's unclear if whether it was indeed a fashion choice or an attempt to disguise his face - but the latter failed spectacularly as the media caught on.

The Canadian star is in the country as he takes his 'Believe' world tour to the UK.

British singer Ella Paige, meanwhile, took to Twitter recently to deny rumours that she is dating the 'Boyfriend' star.

Reports had suggested that Bieber "wooed" her whilst in London, taking the singer to see Justin Timberlake's intimate show after the BRITs on Wednesday (February 20). Watch Justin Bieber perform live below: