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Princess Diana's brother, Earl Spencer, made several shocking claims in his new memoir "Swan Song: Diana, My Sister," including an accusation that King Charles acted "giddy" when Diana died. Royal insiders and those close to Charles have pushed back, insisting he was actually "devastated" by her death. The book's revelations have reignited scrutiny of the royal family's history surrounding Diana's death, with commentary from Showbiz Cheat Sheet detailing the most contentious claims.