I don't think the guitar playing girl minds being called "a sexy girl playing guitar" because that seems to be exactly how she's marketing herself. When I clicked the link you provided all I see is a wall of cleavage lol.
But I agree with the sentiment. When I see videos like "Sexy girl does triple backflip on BMX", it sometimes sounds like "Look at this pretty girl that AMAZINGLY manages to walk, talk, chew gum, AND look pretty at the same time! So rare!"
Which is pretty damn insulting because it's like they are trying to qualify all of their accomplishments. It's impressive.... for a GIRL!
Yet I can barely walk from my couch to the kitchen without stopping to catch my breath.
(exaggerating to make a point)