Grande's concert was targeted with a suicide bombing which killed 22 people when an attacker detonated an explosive device as fans left Manchester Arena on May 22.
Grande was meant to be performing during the ceremony to remember the victims of the attack that took place at her concert in May past year but was instructed by her doctor not to travel due to illness.
But despite being keen to make an appearance, unfortunately she's now been told by doctors she's not up to it and has dropped out last minute. It's race against time to get someone to do what is very much the centrepiece of the entire show. "The whole industry wants to come together to pay their respects to the victims", a source previously told The Sun of the BRIT Awards tribute.
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The insider added: 'The effects of that bad night resonated far and wide in the music industry and it's only right everyone comes together to pay their respects'. It's sure to be one of the moments of the evening.
As reported by the BBC, the Brit Awards' chief executive Geoff Taylor confirmed that Ariana was unable to travel to London for the performance "on doctor's orders".
However, subsequent reports by the same publication are suggesting that Liam Gallagher - who himself performed at the One Love Manchester concert last summer - is preparing to step in and sing the Oasis hit "Live Forever".
The Wall of Glass singer, who lost the Best British Male Solo Artist award to rapper Stormzy, was initially not expected to perform as he had earlier slammed Brit Awards bosses on social media for not allowing him to appear at the bash. "I promise they won't be disappointed".