Premise: Windows and Walls is the eighth album by American singer-songwriter Dan Fogelberg, released in 1984 (see 1984 in music). The first single, "The Language of Love", reached  13 on the U.S. "Billboard" Hot 100 chart. Although the follow-up, "Believe in Me", missed the Top 40 of the pop chart, peaking at No. 48, it became the singer's fourth No. 1 song on the "Billboard" adult contemporary chart.
Hypothesis: Dan Fogelberg actually bought 13 billboards in honor of his achievement on the charts.