This song it seems to be Blair's theme song, as this episode primarily follows her troubles as she tries to fit appearing in. If you want to know robe to use over other clothing or pajamas, a kimono style robe is a good variety. http://dallassymphonyonline.net/__media__/js/netsoltrademark.php?d=Medium.com%2F%40minesade6%2Fdiyarbak%25C4%25B1r-s%25C4%25B1n%25C4%25B1rs%25C4%25B1z-escort-6427b05e933b