Back in the day, when I took computer class in kindergarten (and was very hip), the thrill of a lifetime included typing a few words into a program on a little Macintosh Classic and letting the computer robotically repeat them. This was when we could chuckle at the word, "stupid."
Let them sing it for you brings back the same but updated thrill of kindergarten computer class. Instead of the computer repeating robotic-sounding phrases back at you, it repeats individually-stored words from popular songs to form a merry little compu-tune that you can send along or listen to at your own will.
Only this time "stupid" is the least comical of my vulgar vocabulary.