It’s not exactly unusual behavior for Britney ... Ms. Spears also enjoys trying on her new looks and sharing them with fans.

Britney Spears/Instagram; Sankei Archive/Getty Britney Spears threw it back to the '90s for her latest dance ... a red bikini bottom with pink flowers and a pair of white knee-high boots.

Britney Spears is feeling herself ... At one point, she lifted her pink dress, playfully flicking the fabric as she grooved to the beat and threw in her signature hand gestures.