The 30-year-old singer took to Twitter to term the rehab rumors as "hilarious" and told her more than 17 million fans that she is only addicted to the famous Christmas songs by late singer Bing Crosby, reported People magazine.
"The rehab rumors are hilarious! The only thing I'm addicted to right now is Bing Crosby. Merry Christmas everyone! and to all a goodnight!," she posted on Twitter.
The 'Complicated' hitmaker said she was having some health issues and requested her fans to keep her in their prayers.
Lavigne was back to wishing people a happy holiday and merry Christmas yesterday.