Laurie Buffett McGuane is remembering her late brother. Speaking with People, the sister of Jimmy Buffett revealed that she and the "Margaritaville" singer both battled cancer at the same time. [readmore label="READ MORE: " link="https://etcanada.com/news/1017762/jimmy-buffett-margaritaville-singer-dead-at-76/" text="Jimmy Buffett, ‘Margaritaville’ Singer, Dead at 76" /] “Jimmy and I were diagnosed with cancer about the same time,” Laurie said.…