Jessie J and the Trinity ball

Discussing the disgraceful behaviour of Amanda Brunker at Oxygen - which is also the first time I relaxed my strict no-Irish-celebrities- rule on this blog - Z drew this to my attention - Jessie J after her Trinity Ball gig. Apparently she announced on stage that we drink too much and then tweeted this:
What a tool. Pissing off an entire country of people you expect to buy your records and read your interviews is maybe not the best PR move going. It's like going to Amsterdam to play a gig and announcing they smoke too much. Not going to go down too well.
Wonder if that's why she actually pulled out of playing Oxygen - if the broken foot rumour is true then all fine and well, understandable. But if it's over this - unacceptable.
Whatever, it's not like her music actually matters now does it?