Her new single, "Head Above Water," marks the star's comeback after a nearly five-year hiatus. Lavigne revealed that her battle over the years was a scary one. She thought she br “was dying” and br said "I had accepted br that I was going to die.” Avril Lavigne, via 'USA Today' The singer was bedridden for years as she fought the disease and said her body became weak. Lavigne also thought her voice would weaken over the years but “it ended up being stronger br than ever.” In addition to her return to music, Lavigne is pushing for Lyme disease awareness with her foundation.