Adele has been put on voice rest after struggling to hit certain notes during her Las Vegas residency

She told the audience: "I'm sure you can hear it in my talking voice and my singing voice. Your girl was tired. I didn't sleep very well.

"And Ursula from the ocean has come from my chest tonight.

"I can't hit my headnotes properly. I didn't sleep very well and my chest is on fire.

"Straight after this show I am going on voice rest."

The 'Someone Like You' songstress - who has 11-year-old son Angelo with ex-husband Simon Konecki - recently bragged to the audience that she could "easily" drink far more than them even though she has cut back on alcohol since becoming a mother as she wondered whether her penchant for a tipple came from the fact that her British culture is home to a number of rockstars.

She said: "I do like a drink. I can't lie. (I have) definitely cut it back, especially since I've become a mum and I've become a professional artist, but easily, easily, easily could drink any one of you under the table.

"And maybe it's the Brit in me. But the stability that this has given a bunch of basically rockstars that are working and including the crew and everybody like that is second to none. And it's given us peace of mind!"