Madonna has been using an inhaler during her BRIT Awards rehearsals.
The 56-year-old singer will take to the stage at the O2 Arena this evening (25.02.15) to perform her new single 'Living For Love' but has been struggling to get through practise shows, forcing her to use a vaporiser to soothe her vocal cords as she is "desperate to give the performance of her life."
A source revealed: "She is putting all her efforts into putting on a great show. She is working every hour, day and night, to ensure it will be her part of the show that everyone will be talking and tweeting about."
The 'Hung Up' hitmaker hasn't performed at the ceremony since 1995 and will be hoping to upstage fellow singers Taylor Swift, Ed Sheeran, Sam Smith, and Kanye West during the event.
And the performer - who has 18-year-old daughter Lourdes, son Rocco, 14, and adopted children David and Mercy, both nine - has been showing the other stars who's boss with her spacious backstage area, which includes four dressing rooms and a regal throne.
The source continued: "There's no mistaking who the Queen of Pop is back here."
As well as a rider featuring Champagne and Earl Grey tea, the star has a boudoir which includes a changing room, living room, bathroom and a room dedicated to her make-up.
The source added to the Daily Mirror newspaper: "Madonna has by far the biggest backstage area and it has been decorated especially for her. Even the wash basin is draped in silver velvet curtains. It has an incredibly regal feel to it."