Yoga instructor Bette Calman may be 83, but she's still bending over backwards to spread the benefits of the ancient Indian discipline. The nimble grandmother can really pull some shapes and with her set hair and pearl earrings she looks as glamorous as Greta Garbo in a pink jumpsuit. With 40 years of teaching under her belt, the Australian wonder is living proof that a lifetime's dedication to yoga will keep you flexible as a rubber band.