Jinglewhimsy
n.- The interjection or juxtaposition of a commercial jingle to emphasize the sentiment of a statement or exclamation. (Common, but not exclusive, to the writing style of the post-modern brat-pack/indie/hipster genre of Diablo Cody.)
I can't believe how exciting this all is. 'Bah-da-bah-ba-BAAA, I'm loving it.' (To tune of 'McDonald's theme') Don't let my jinglewhimsy detract from the seriousness of that statement.