Pop singer Britney Spears has reportedly spent $30,000 on air.
The American celebrity is said to have purchased a private oxygen chamber, after fears she'd been damaging her voice.
Spears is currently on the North American leg of her 'Circus' tour.
A gig in Vancouver left the 27-year-old gasping for air when audience members were reportedly smoking inside the venue.
Oxygen chambers have been known to reverse damage caused by smoke inhalation.
Celebrities such as Madonna, Mick Jagger and Michael Jackson have previously purchased similar machines.


