How old was celine dion when she "got together" with rene?

i was watching Kathy Griffin "strong black woman" stand-up and she said somthing about Celine Dion being 12 or 13 when she "got together" (i'm using a nicer words than KG) with her husband Rene- i read that she was 22 or 23 but i had heard younger from tabloids- anyone know when?