Lisa Rinna has bared all in a new eyewear campaign for designer Christian Cowan.The 56-year-old shared several racy snaps on Instagram in which she can be seen wearing nothing but a pair of Christian Cowan X Le Specs sunglasses, and simply captioned the shots: “CHRISTIAN COWAN X LE SPECS. Shot by @gregswalesart.”The Real Housewives of Beverly Hills star caused a sensation with the nude photos, and her family was among the first to comment on her posts.