Britney Spears' wellbeing is "a concern" to those close to the star if she lands a Las Vegas residency, it has been reported.
According to a source, the singer is currently preparing for her shows at Planet Hollywood Resort and an unspecified casino.
However, considering her past mental health problems, Britney's team and family are worried the mother-of-two could crumble under the pressure.
"There is little chance that she can do actually do this. The stress of a daily public appearance and the physical nature of a show could overwhelm her for sure," a source connected to the star told FOX411's Pop Tarts column. "As the show comes closer, she may start to fall apart. It's definitely a concern."
Britney suffered a breakdown in 2008 and was subsequently placed under the conservatorship of her father, Jamie Spears.
While she has made a successful return to showbiz with a hit tour in 2009 and a stint as a The X Factor US judge in 2012, the pop star's lifestyle is micro-managed by her parent and work commitments are reportedly contracted to allow for special requirements.
"Britney has been living a relatively laidback life recently, and these concerts are back-to-back and very intense," celebrity psychotherapist Stacy Kaiser commented. "There is a good chance the pressure to perform regularly and the distance from her support system can send her into a spiral."
Meanwhile, Britney herself has revealed she is hitting the gym shape up for her time in Sin City.
"The [Vegas] performances won't be simple – they'll be a massive party from start to finish," the pop princess told the American edition of Shape magazine. "And to pull this off, I have to be in top condition and running at full speed."