Britney Spears reportedly spends four hours a day in a sauna.

The 32-year-old singer likes to wind down and relax in the Mandara Spa at Planet Hollywood in Las Vegas, where she has a permanent VIP suite during her 'Piece of Me' residency, and has even found that the dry heat sessions has boosted her weight loss.

A source told the Daily Star newspaper: ''She managed to lose five pounds and credits her new love of saunas. She thinks it's a great way to shed weight without really trying. She's loves soaking up the heat and relaxing so much she often has two two-hour sessions in a single day.''

However, sweating out in a sauna isn't the only thing the blonde beauty enjoys doing in her spare time as she also likes to do ''normal'' activities with her young sons Preston, nine, and Jayden, eight, whom she has with her ex-husband Kevin Federline.

She said: ''I love swimming, I swim all the time, I love going to the spas, I love cooking, I love studying with my boys and doing just normal things like that.''

Meanwhile, the 'Toxic' hitmaker split from her boyfriend David Lucado in August after 18 months of dating but, rather than be upset about the break-up, she insists she's just focusing on her goals right now.

She said previously: ''I am pretty damn happy right now.''

Asked for advice on being single, she added: ''It's all about setting yourself a goal and going for that and just being motivated and staying true to yourself.''