The World Cup and July 4 brought nine classic hit songs back to the Hot 100.

The World Cup and July 4 brought nine classic hit songs back to the Hot 100.

Toby Keith's "Courtesy of the Red, White and Blue" is now his highest-charting Hot 100 hit, after reaching No. 11 following its 4th of July re-entry.

The Billboard Hot 100 sees nine songs get 4th of July-related boosts onto the chart this week after just one or none in recent years. Here's why.