Washington, November 1 : Christina Aguilera and her ex-husband Jordan Bratman put up a united front over Halloween for the sake of their son.

The former couple was seen in Los Angeles escorting three-year-old Max, dressed as a medieval solider, to different houses to collect his candy.

The pair were married for five years before they filed for divorce in October last year, and it was finalised in April this year, Contactmusic reported.

The pop star has moved in with her new boyfriend Matt Rutler but has shown that she is amicable with her ex-husband when they teamed up to help their son enjoy the Halloween festivities. (ANI)