Every Little Black Star knows how important the date of September 27th is - it's Avril Lavigne's birthday! Avril was born in Belleville, Ontario, Canada to John and Judy Lavigne on this day in 1984 and today she celebrates her 36th birthday! Avril began the celebrations early yesterday with some friends at her home in Los Angeles. Click through the posts below to see Avril's Instagram stories and posts from the day! Credit to @avril_snapchat