Britney Spears alarms fans with erratic dance video while smoking a cigarette

Princess of pop Britney Spears has once again frightened fans with a bizarre social media post. The video posted to Instagram sparked new concerns with fans worried about her welfare. Thousands of fans shared their concerns in the comments section of the video, with one saying the entire post was "very sad" to watch over the weekend. The 42-year-old looked tired while dancing alone in her sparse room of her house, with another fan commenting Britney needed to "stop smoking because she's burnt out". The video has since been removed from the icons Instagram account.