<human>:  Would Kelly Clarkson's voice shake glass?
<bot>: Yes, Kelly Clarkson's voice is powerful enough to shake glass. Glass vibrates at its resonant frequency which is around a middle C note. Kelly Clarkson has an impressive three octave vocal range. Kelly Clarkson's Never Enough is in the key of A-flat. A-flat is above middle C in terms of notes. So Kelly Clarkson's voice would shake glass.