Britney Spears fans have expressed their concern for her after she posted about enjoying a wild night in.The pop star, 41, who split from her husband Sam Asghari last week, took to her Instagram account to share a series of snaps of her partying with pals - after accusing another friend of calling the paparazzi on her. “When you go to meet up with a so called “friend” and drive an hour for chicken,” Britney wrote in the caption: “then you have to wait in the car and need to use the bathroom.” Britney said she “knew paps were tipped off” by her pal as she was driving a car that had never been “used before”, as she questioned, “so how was I followed??” But a defiant Brit was determined not to let the nasty run in but a dampener on her night, as she added: “so what does a b***h like me do? !!??! I put my green dress on and show up at my friends !!! I invited my fav boys over and PLAYED ALL NIGHT !!!” Britney donned a skintight shimmery green mini dress and knee-high cream boots as she messed around with friends in her living room and by the pool.