Trader consensus has locked in "Other" at 100% implied probability for the #2 Spotify artist in April, driven by end-of-month streaming metrics showing Justin Bieber with 134.3 million monthly listeners, a mere 2.6 million behind Bruno Mars's dominant 136.9 million but well ahead of The Weeknd (115.6 million) and Rihanna (110.6 million). Bieber's positioning stems from explosive catalog streams of hits like "Beauty And A Beat" topping global daily charts, sustained by viral TikTok traction and playlist dominance throughout late April. No listed options crack the top four per trackers like Chartmasters and kworb, cementing the lead. Realistic upsets would require an unprecedented final-hour listener surge by a contender like The Weeknd, though the 20-million gap and market close make this negligible.