**BbY WOW** by KAROL G, Judeline, and rusowsky commands overwhelming trader consensus at 95.5% implied probability for the top Spotify song the week of September 18 due to its dominant global streaming trajectory. The track, from Karol G’s August 2026 album *No Me Arrepiento de Sentir Tanto*, surged to No. 1 on the Billboard Global 200 with 42.3 million streams in a single tracking week—a 62% jump—while holding the Spotify Global daily top spot for multiple consecutive days with peaks above 5.7 million plays. Strong Latin-market performance, TikTok virality, and its interpolation of a classic dancehall hook have fueled sustained momentum through early September, outpacing older catalog tracks like Justin Bieber and Nicki Minaj’s “Beauty and a Beat.” An upset would require an unforeseen major new release or abrupt streaming reversal in the final days before the weekly chart locks.