britney spearsBritney Spears has reportedly become worried about the future of her voice - and has bought a $15,000 oxygen chamber to keep her lungs in top condition.

The singer’s final show in her North American tour is set to take place in Canada tonight but she’s just signed on for another 12 shows around Europe next month, after she finishes her nine show stint in the UK - and a source close to the star revealed she wants to keep singing as much as she can.

The source told the Sun: “Since her Vancouver gig, where she ran off stage as it was too smoky, she’s become paranoid about breathing in too much bad air.

“She’s keen on an oxygen chamber that will reverse any smoke inhalation damage.”