Los Angeles: Singer Avril Lavigne marked her 31st birthday by launching a global campaign to raise funds for those who are struggling with Lyme disease.


Avril Lavigne. Pic/Santa nn

The "Girlfriend" crooner, who herself suffered a severe case of the disease, wrote on Twitter on Monday: "For my b-day, I want to help people w/ #Lyme disease. Join me & you could be in #CharmingwithAvril: http://Prizeo.com/Avril @AvrilFoundation".