Jack White got a two-for-one special when he proposed to his girlfriend and married her on the same night!The 46-year-old singer popped the question to his girlfriend, singer Olivia Jean, on Friday in front of his sold-out crowd at the Masonic Temple in Detroit. According to the, White, who had just embarked on his Supply Chain Issues tour, brought up Olivia for a duet of the White Stripes' 2001 hit «Hotel Yorba,» and while introducing her to the crowd he told her he had a question.«Will you marry me?» asked White after pulling out a ring.