By Julia Pritchard for MailOnline. But Mariah Carey went one step further on Friday, stripping completely naked as she documented herself indulging in a bubble bath. The year-old singer flashed her famously ample bust to her 4. Rub a dub dub! Mariah Carey, 46, bared all for her fans on Friday as she documented herself indulging in a relaxing bubble bath on Instagram. The star threatened to showcase all her assets as she lay in the tub, with her modesty only covered by the bubbles.