Las Vegas -- Celine Dion has called it a wrap at Caesars Palace, acknowledging in her final show that pregnancy and poor early reviews almost sank her titanic five-year engagement. As adoring fans cheered, stood and clapped through Saturday night's performance, Dion interspersed her usual numbers with emotion-filled monologues. "At one point, it was like feeling like the Titanic was about to sink again,'' she said.