A track like “Diamonds” requires incredible dynamic control—you need to keep the lower verses dark and mysterious while building up to an explosive, shimmering chorus without losing pitch precision. For Lovelle Hill, who had been honing her craft and writing her own music in London, this was her ultimate shot to show the superstar panel what she was made of. Her voice carried a rich, velvety warmth, effortlessly blending a sultry chest tone with crisp, modern R&B vocal runs. Instead of simply copying Rihanna’s signature delivery, Lovelle brought her own soulful phrasing, swelling the dynamics until the chorus rang out with incredible clarity and strength. Superstar vocal coach Jessie J and hitmaker Will.i.am listened intently to her pitch control and artistic identity.