LINCOLN, R.I. — Jeffrey Osborne took questions from Providence Journal Executive Editor Alan Rosenberg in advance of a performance Saturday afternoon at the Life: Boomers and Seniors Expo at Twin River Casino.The rhythm-and-blues musician told Rosenberg that he likes to drink alkaline water and he's recently become a vegan."I'm a health freak," he said.Check back soon for more coverage of the Life: Boomers and Seniors Expo