Rihanna's first ad campaign for Emporio Armani was named the sexiest campaign of 2011, so it comes as no surprise that the brand decided to prolong the successful collaboration. The second ad, which has just been released, is even more attractive than the first. The singer looks natural and beautiful posing in simple but sexy clothing. Rihanna, who is known for her controvercial performances, risky statements and provocative clothing, ...