Brian May and Roger Taylor performed together at several award ceremonies and charity concerts, sharing vocals with various guest singers. During this time, they were billed as Queen + followed by the guest singer's name. In 1998, the duo appeared at Luciano <answer>Pavarotti</answer>'s benefit concert with May performing "Too Much Love Will Kill You" with <answer>Pavarotti</answer>, later playing "Radio Ga Ga", "We Will Rock You", and "We Are the Champions" with Zucchero. They again attended and performed at <answer>Pavarotti</answer>'s benefit concert in Modena, Italy in May 2003. Several of the guest singers recorded new versions of Queen's hits under the Queen + name, such as Robbie Williams providing vocals for "We Are the Champions" for the soundtrack of A Knight's Tale (2001).
Who performed with Brian May in 1998 at a benefit concert?
Pavarotti