A quick study of Selena Gomez's well-rounded résumé, which includes a hit TV series, a chart-topping solo record and several high-profile movies, might leave some wondering if there are any weaknesses to be found in this 21-year-old multimedia star's repertoire.

Maybe. But it's definitely not her live show.

Gomez was terrific on Sunday night at the SAP Center in San Jose, captivating 粉丝 with a well-thought-out 显示 that sparkled from start to finish. It was the kind of thoroughly entertaining outing, delivering equal amounts of pizazz and polish, that makes one think Gomez could have a real...