Charli XCX won't stand in for Sam Smith at the Australian Logie Awards if it's on her day off.

The 'Boom Clap' singer is in Australia performing concerts on the East Coast and is considered to be the ideal replacement for the 'Stay With Me' singer, who can't attend the 57th TV awards show on Sunday. (3.05.15) due to an illness.

Although Charli would ''happily'' step in for Sam, she won't do it on her day off.

In an interview on the 'Kyle And Jackie O Show' on Australian station KIIS 106.5 FM, , she said: ''If it's on my day off then maybe not.''

Asked whether her days off are important, she said: ''Yes because I never get them.''

Sam was forced to cancel his Australian tour and his appearance at the award show, because he had a blood clot on his vocal chords.

The 'Lay Me Down' hitmaker posted a statement online that read: ''I have been vocally exhausted for a while now, however, last night in Sydney I had a small hemorrhage on my vocal chords.''

Sam, 22, added: 'The doctors have told me I need to fully rest until my vocal cords have healed, otherwise this could become a huge long-term issue. I am so sorry to all who have bought tickets, I truly am. This kills me.''