Stella Lefty’s “Boston” commands overwhelming trader consensus for the Billboard Hot 100 #2 spot the week of September 26 because of its dominant streaming velocity, sustained radio airplay, and sales trajectory that have kept it locked in the upper tier for multiple frames. Market-implied odds above 98% reflect consistent chart data and historical patterns showing few songs overtake such momentum this late in a tracking week. A realistic upset would require an unexpected late-week surge from a competitor—such as a major playlist addition, viral moment, or release-day spike for another track—that shifts final streaming and sales tallies enough to reorder the top two before the chart locks.