That was me when I heard my mum singing "American beauty/ American Psycho". Then she walked past my room, stopped, looked at me and said "See, this is what happens when you've been up since 2 in the morning." Then she literally runs off down the hallway. Still singing.
http://ak-hdl.buzzfed.com/static/2014-03/enhanced/webdr03/31/11/enhanced-5041-1396278170-14.jpg