"This week's mailbag looks at the top chart hits by ths week's Billboard cover act, Pharrell's rapid-fire rise to No. 1 on Radio Songs and Demi Lovato's career song and album sales".
اطلع عليه بتاريخ January 13, 2016.  الوسيط |تاريخ الوصول= تم تجاهله (مساعدة); الوسيط |المسار= تم تجاهله (مساعدة); الوسيط |العنوان= تم تجاهله (مساعدة); الوسيط |الناشر= تم تجاهله (مساعدة) "This week's mailbag looks at the top chart hits by ths week's Billboard cover act, Pharrell's rapid-fire rise to No. 1 on Radio Songs and Demi Lovato's career song and album sales".