Hollywood's worst-kept secret is back out in the open, only with far more dirty details this time around. The new book, Mick: The Wild Life and Mad Genius of Jagger, discusses the hot and heavy romance between two of the most famous singers ever -- Mick Jagger and David Bowie. In the salacious biography, author Christopher Andersen claims that the Rolling Stones lead singer and Bowie got intimate not long after meeting each other in the early '70s. He writes that soon after their first backstage encounter the two were all over each other, "Bowie and Jagger were soon spotted everywhere together without their wives: sitting ringside at the Muhammad Ali - Ken Norton bout, hanging out at the London disco Tramp, yelling and stomping their approval at a Diana Ross concert, or just cuddling up together on a hotel room couch. Neither superstar complained when one enterprising photographer snapped the two men in a moment of repose, Bowie tenderly cradling Mick's head in his lap. Bowie also took Mick to gay films." Their whirlwind romance apparently commenced one day when a maid found the two men in very compromising positions. The author of the book writes, "By October 1973, the Bowies were living on Oakley Street, just a stroll from Cheyne Walk. Angie had been out of town for a few days when she returned home one morning and went straight to the kitchen to make some tea. The Bowies' maid, who had arrived about an hour earlier, approached the lady of the house with a peculiar look on her face. 'Someone,' she told Angie, 'is in your bed.'" And things were exactly as they seemed, according to the book. "Angie went upstairs to her bedroom, slowly pushed the door open, and there they were: Mick Jagger and David Bowie, naked in bed together, sleeping. Both men woke up with a start. 'Oh, hello,' said Bowie, clearly taken by surprise. 'How are you?' 'I'm fine,' Angie replied. 'Do you want some coffee?' Mick, blinking awake, remained silent. Angie returned a few minutes later with coffee and orange juice on a tray." One back-up singer, Ava Cherry, maintains that the singers sealed the deal on many occasions. "Ava Cherry, a backup singer who lived with the Bowies for a time, reportedly told a friend that 'Mick and David were really sexually obsessed with each other. Even though I was in bed with them many times, I ended up just watching them have sex."