Ed Sheeran scores a double HitPredictor this week, at both Top 40 and Hot AC, with his new single, "Sing." Meanwhile, Katy Perry, Sevyn Streeter and Sara Bareilles all nab their second HitPredictors for their new singles. Katy's "Birthday" is a HitPredictor at Hot AC this week and last week at Top 40. Sevyn's "Next" is a HitPredictor at Rhythmic this week after scoring at Urban on March 10. And Sara's "I Choose You" earns it at Mainstream AC this week; it earned it at Hot AC on March 3.