Gladys Knight, Stevie Wonder, Dionne Warwick rule at pre-Grammy gala hosted by Clive Davis

LOS ANGELES (AP) — The night began with a rare sight: tennis champion Serena Williams was flustered. “I'm a little nervous... I can't breathe,” she said through an exasperated smile. “I'm usually really good at this.” The overwhelming task was not opening the famed Clive...