Jayden James is dressed as Batman, while Sean Preston chose a ninja costume.
Britney Spears is currently performing her Femme Fatale tour in London, England.
Brit tweeted: “Loved celebrating Halloween in Londontown with my family!” and posted the pic to Google+.
Spears has been sweet to fans on Twitter, sending out her thanks for their warm comments after seeing her show.
She even asked fans to send pics of themselves in costumes and voted for her favorites to get a signed Criminal t-shirt!
photo: Britney Spears Google+