United Kingdom, July 12 -- Britney Spears has dismissed concerns about her seemingly bizarre antics on a Los Angeles highway.

Video footage emerged earlier this week of the Toxic hitmaker, 44, standing through the moonroof of an SUV driving on the 101 Freeway but she has taken to Instagram to claim that "nothing is what it seems" when it comes to the incident.

Sharing a screenshot of herself peering out of the car on the social media platform, Britney wrote: "What people see is two seconds of insanity of me arching me to the lords!!!! Yet the days and hours of my reality!!!!! Nothing is what it seems.

"Psss I think I need to come out of the roof quite a bit more."

Britney is believed to have spent around two minutes standing through t...