Britney Spears' Knife Dance Sparks Concern Among Fans

Britney Spears' newest Instagram video is sparking concerns among her fans. In the new video, Spears spins around her house twirling knives that she claims are not real. "Don’t worry they are not real knives!!! Halloween is soon!!!," she tells her 42 million followers. However, one concerned fan says "Those knives are definitely not fake!" Meanwhile, Spears' little sister, Jamie Lynn, is gearing up to make her ballroom debut in the new season of “Dancing with the Stars.”