According to E! online the "Complicated" hitmaker is getting "stronger and stronger" and has more energy than before.
"Avril is in a really good place right now. Her recovery has been going well and she's been getting stronger and stronger. She has more energy and has even been exercising," a source said.
The 32-year-old singer is also planning to release new music by the end of 2017.
"She should be releasing new music by the end of the year. It's been a slow process. She writes her own material and she's been through a lot with her marriage and her illness. She has a lot to say," the source added.