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Florida Georgia Line's "Cruise" appears to be on cruise control, and is marking its record-tying 21st week at number one on the Billboard Hot Country Songs chart. 

The duo's hit is only the fourth single to log the accomplishment since the chart originated back in 1944, and it's the first to spend a total of 21 weeks at number one since Webb Pierce's "In the Jailhouse Now" back in 1955. acknowledges that the success of "Cruise" on the chart is due in part from a change in the way the publication calculates the weekly rankings.  Last fall "Billboard" began including paid downloads, streaming data, and other statistics along with traditional radio airplay impressions to determine a song's chart placement.  "Cruise" also enjoyed a resurgence with the April release of Florida Georgia Line's collaborative remix of the song featuring Nelly. 

In addition to the Florida Georgia Line and Webb Pierce hit, Hank Snow and Eddy Arnold have also had songs top the chart for a total of 21 weeks.  Snow did it in 1950 and '51 with "I'm Moving On," and Arnold was the first in 1947 and '48 with "I'll Hold You In My Heart (Till I Can Hold You In My Arms)." 

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