Mood: The mood of the video appears to be edgy and bold, with a hint of sassiness. The theme seems to revolve around confidence, style, and possibly a touch of rebellion, given the title 'Mean Girls' and the attire of the individuals. The overall emotion exuded is one of youthful exuberance and a bit of defiance.

Environment: The environment seems to be a dimly lit, possibly upscale or trendy setting, given the clothing and accessories of the individuals. The background hints at an indoor location with lighting fixtures visible, suggesting a nightclub, lounge, or a high-end event space.