Stella Lefty’s “Boston” commands overwhelming trader consensus at 93.5% implied probability for the Billboard Hot 100’s #2 spot the week of September 12 because it has held or approached that exact position in recent tracking weeks behind Ella Langley’s dominant “Choosin’ Texas.” The country-pop track benefits from sustained multi-format radio airplay, robust streaming totals exceeding 16 million in recent periods, and crossover appeal tied to its Noah Kahan interpolation, which helped it climb steadily since debuting earlier in 2026. Other contenders such as Taylor Swift’s “I Knew It, I Knew You,” Ariana Grande’s “Hate That I Made You Love Me,” and Morgan Wallen tracks sit at single-digit odds because they lack comparable recent momentum or chart trajectory. An upset would require a major new release surge, sharp shifts in streaming or sales data, or an unexpected decline in “Boston”’s metrics before chart lock.