We just got a new girl in the office, and she's very nice, but she hums, sings and talks to herself constantly. She's also very giggly and makes up little songs about our clients names then giggles about it. This is all very annoying and is making me crazy. I think the boss is a little put off as well. My question is, how do I POLITELY let her know it's got to stop. Today it was so bad I nearly screamed. Thanks for any advice you can offer.