Ring finger nail polish trend

I've recently noticed a new nail polish trend. A girl helping me out at a clothing store a few weeks ago had all her fingernails painted one colour except for her ring finger. I didn't think much of it. I actually thought that she may have been sampling a new nail polish colour and had forgotten to fix her nails up. But I have started to notice this trend more often in the past few weeks. Cute or tacky? I have yet to decide.