By Chiara Fiorillo Britney Spears has sparked concern among her fans as she published a new dancing video on Instagram after some sources claimed her conservatorship should have continued due to fears about her mental health. The 42-year-old singer filmed herself dancing to “Despacito” while wearing a pink bikini paired with black boots in her living room. In the clip, she can be seen moving her hips, walking back and forth, turning around, and spinning her head as she seems to sing along to Luis Fonsi’s Latin hit. At one point, Britney sticks her tongue out as she smiles at the camera and con…