The Hot 100 Airplay chart was first published in the Dec. 8, 1990 issue of Billboard. That means that Mariah Carey's "Vision of Love" never appeared on this tally, because it was a hit before the chart existed. The chart's first No. 1 was "Love Takes Time," which would have had two more weeks at No. 1 had the chart been published earlier. Despite this, Mariah has racked up 89 weeks in the lead position. Here's how it all adds up: