Weird flowers

I think my hydrangea is bipolar.  It has always bloomed in white all these years.  Not this year, it is pink, blue, white, green and lavender.  It's only one plant.  You can pick the color you want in some hydrangeas by manipulating the acid or alkalinity of the soil.  I haven't done anything different this year.  I'll just enjoy the show, it's stunning, fat and full of blooms.