Avril Lavigne is back with new music. The "Girlfriend" hitmaker, who has been battling Lyme disease for the past two years, surprised her fans on Christmas by announcing that she's working on her sixth studio album that's set to be released in 2017, AceShowbiz reports.

Avril shared on Instagram a photo of her sitting in front of a piano along with a lengthy message. "Hi Everyone!! I wanted to first thank my fans for your patience & support during my time away throughout my battle with Lyme Disease over the past 2 years," she wrote, "It hasn't just been a hard battle but it's also been enlightening and will reflect in my new music, artistry, life, and personally. I will always continue to make it a priority to fight and raise awareness about Lyme Disease with the Avril Lavigne foundation."

The "Complicated" singer added, "I'm really happy to announce that I am now working on new music and I will be releasing a new album in 2017. I can't wait to open up and share my heart with you! I'm excited for you guys to hear the new songs. It's going to be an amazing 2017!"

Avril has put her career on hold after she was diagnosed with Lyme disease back in 2014. She released her fifth album "Avril Lavigne" back in 2013 and dropped a couple of songs including "Fly", the main theme song for the Special Olympics and a collaboration with Nick Carter in 2015.