In October , People en EspaÃ±ol added her to its list of the 25 most powerful women . Singer 's plane was flying at 300 feet when it began to plummet , official said . It could have plunged at more than 600 feet , the transportation secretary says . Finding what caused the crash in northern California could take up to a year . Some of Singer 's family members believe she could be alive .
Singer 's plane was flying at 300 feet when it began to plummet , official said . It could have plunged at more than 600 feet , the transportation secretary says . Finding what caused the crash in northern California could take up to a year . Some of Singer 's family members believe she could be alive .