I’ve been a fan since 1987 and she was already a superstar even then - I live in the U.K. and i remember her having 8 singles in the charts in 1985 which I think at the time was a record plus live aid and the whole penthouse scandal so I would say 1985 too but I wasn’t a fan nor even a fan of music then - it was family who introduced me to music - the true blue era is my favourite in terms of music , videos , artwork and of course the magnificent wtg tour and I’m going to get shot down for this but I just love the who’s that girl movie too - it was my first cinema experience and I remember being given a badge and press pack which sadly I don’t have any more . I agree with other comments that the blond ambition tour elevated her to icon status and put her in the same league as my 2 other favourite icons MJ and Prince- an era that she will never sadly replicate again ?