Stella Lefty’s “Boston” commands 91.5% implied probability for the Billboard Hot 100’s No. 2 spot in the week of October 3 because it has held that exact position for multiple recent frames behind Ella Langley’s record-setting “Choosin’ Texas.” The track’s TikTok-driven breakout, country-pop crossover airplay, and steady streaming have produced durable top-five traction with minimal competition from other releases. Langley’s additional singles, plus tracks from Taylor Swift, Ariana Grande, and Morgan Wallen, sit at just 3% odds, reflecting their current lower chart velocity. An upset would require “Choosin’ Texas” to finally tumble while a new single posts outsized gains in the final tracking week, a scenario traders view as unlikely given the established momentum.