The event was hosted by Wave 105's Mark Collins and there were some special guests from the city's pantomimes as well as a Christmas show alongside a special appearance of Father Christmas and snowflake finale.
Here are 35 pictures from the event:
29. Commercial Road Christmas Light Switch On
Hundreds of residents descended on Commercial Road to watch local dance troops and celebrities come together to turn on the Christmas lights. Pictured - Dale Family from Southsea Photos by Alex Shute Photo: Alex Shute
30. Commercial Road Christmas Light Switch On
Hundreds of residents descended on Commercial Road to watch local dance troops and celebrities come together to turn on the Christmas lights. Pictured - Bradley Family, with Louie, 1 from Southsea Photos by Alex Shute Photo: Alex Shute
31. Commercial Road Christmas Light Switch On
Hundreds of residents descended on Commercial Road to watch local dance troops and celebrities come together to turn on the Christmas lights. Pictured - SD Studio dancers Photos by Alex Shute Photo: Alex Shute
32. Commercial Road Christmas Light Switch On
Hundreds of residents descended on Commercial Road to watch local dance troops and celebrities come together to turn on the Christmas lights. Pictured - Wave 105's Mark Collins Photos by Alex Shute Photo: Alex Shute