Yes, we all know Josh can improvise. But I was one of the few, apparently, who had NO IDEA how high he can get his voice to go. SERiously. It's like he has a tiny, 6-year-old girl inside him (well, that didn't come out right).
Also, Nikki is definitely, as I have long suspected, the single most fearless improviser in Kansas City. And her two-shots-from-total-strangers-winning karaoke performance should prove that.