As far as my knowledge reaches for public events:
2001: Les Enfoirés
2002: Les Enfoirés
2003-03-03: "Pour Laurette" A charity program for kids with leukaemia.
She gave away her double diamond disc (Moi... Lolita) for an auction.
2004-05-17: "Pour Laurette, un an après" (a year later)
She gave away her blue dress (JPVA) for an auction.
2008: Les Enfoirés
2008-03-20: Fight Aids Monaco (Hommage à Gainsbourg)
2009: Les Enfoirés
2000 till present: Her public presence on this world to all of us....