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The singer and son Sean were accused of assault after they were refused access to a private event on New Year's Eve, according to a police report.

Sean, 41, allegedly shoved the security guard and Sir Rod, 76, struck his chest "with a closed fist", the report said.

The pair have entered guilty pleas to a misdemeanour count of "simple battery".

It means neither will go to court, nor will they go to jail, pay a fine or go on probation, Sir Rod's lawyer Guy Fronstin said.

The judge withheld adjudication - meaning they have not been formally convicted.

Barbara Nielsen's son, Damien, welcomed her home from a business trip by holding up a sign that read "welcome home from prison Mom".

Ms Nielsen had just got off the plane from a business trip for the manufacturing company she works for and was waiting at the baggage claim when she was greeted by her family and the embarrassing sign. 

But even she could see the funny side in the practical joke, posting a picture of the sign on Facebook.