How old was avril lavigne when she sang girlfriend?

Avril Lavigne was 22 years old when she released the song "Girlfriend" in 2007. Born on September 27, 1984, she was in her early twenties when the song became a hit. Lavigne's energetic and rebellious persona in the music video for "Girlfriend" resonated with her young fan base and helped propel the song to the top of the charts.