<prompt> Wakati wa maonyesho hayo, Christina Aguilera alitoa wimbo wake wa kwanza, Fall in Line, ambao ni wimbo wa kwanza wa Christina Aguilera kutembelea Amerika ya Kaskazini tangu Septemba 25, 2008, wakati wa maonyesho yake katika New York City, New York, Chicago, Los Angeles, Boston, Los Angeles, Denver, Los Angeles, New York, Los Angeles, New York, Los Angeles, New York, New York, Atlanta, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York, New York  <response>: Christina Aguilera ametoa wimbo wake wa kwanza, Falling in Line, na Demi Lovato kwenye sherehe ya tuzo ya muziki ya Billboard Music Awards iliyofanyika tarehe 20 Mei, mwaka huu, na kutangaza ziara yake ya kwanza ya Amerika ya Kaskazini tangu mwaka 2008, ambayo itaanza tarehe 25 Septemba na kusafiri kwenda miji 22. 