A conspiracy theory that originated in 2011 states that Canadian singer Avril Lavigne died in 2003, shortly after the release of her debut album, Let Go (2002), and was replaced by a body double named Melissa Vandella. Evidence used to support the theory include changes in Lavigne's appearance between 2003 and the present, supposed subliminal messaging in her follow-up album, Under My Skin (2004), and a photoshoot in which Lavigne has the name "Melissa" written on her hand. The theory is the subject of the BBC Sounds podcast Who Replaced Avril Lavigne?
https://en.wikipedia.org/wiki/Avril_Lavigne_replacement_conspiracy_theory