**Current monthly listener data positions Rihanna narrowly ahead of The Weeknd for the #2 spot behind Bruno Mars on Spotify, yet trader consensus slightly favors The Weeknd at 43% implied probability versus Rihanna’s 36.5%.** Both artists maintain strong, consistent catalog streams that sustain high unique listener counts over the rolling 28-day window, with The Weeknd showing a modest daily gain while Rihanna’s figure edges slightly lower. Bruno Mars leads overall but sits at just 7.8% for second place, reflecting limited upside from his established peak. Lower-probability names like Billie Eilish and others trail due to smaller recent listener bases and seasonal competition. October’s outcome hinges on daily fluctuations in playlist adds, viral tracks, and any late-month releases that could shift the 28-day window before month-end resolution.