Stella Lefty’s “Boston” commands an 88% implied probability to finish at No. 2 on the Billboard Hot 100 dated September 26 because it has held that exact position through early September on the strength of sustained streaming, dual-format radio airplay, and crossover momentum from its summer peak. The track’s steady trajectory—climbing from a low debut to a consistent top-two finish—reflects ongoing playlist support and audience engagement that outpaces newer or fading entries. Ella Langley’s “Choosin’ Texas” remains locked at No. 1, creating a stable buffer, while Taylor Swift’s “I Knew It, I Knew You” has already slid from its June debut high and registers only single-digit odds for a rebound into the runner-up spot two weeks out. With chart tracking windows closing soon, traders are pricing in limited upside for challengers absent a major promotional surge or unexpected sales spike.