Slide the button to see her slim-down! The Queen of Funk, 59, showed off her slender figure at the American Idol finale in May, but what viewers didn't see was the singer's year of hard work. Khan lost 60 lbs. thanks to a four-month liquid cleanse of protein and veggie smoothies. "I did nothing but liquids; me and my VitaMix were best friends," she told Access Hollywood.