She’s known for her sexy attitude, raunchy outfits and outrageous behaviour.So it comes as little surprise that Rihanna’s advert for Nivea has been deemed too sexy to front campaigns for the skincare brand.The star appeared in a series of adverts for the firm, which was a sponsor of her world tour last year, to celebrate the 100th anniversary of the company.And now cosmetic tycoon Stefan Heidenreich - the new head of Nivea’s parent firm, Beiersdorf - has told German media that the singer should have been considered a ‘no go’ for the brand’s family image.The 49-year-old said: ‘The advert starring Rihanna was a no go. I do not understand how Nivea can be brought into association with Rihanna.’In one ad, a family is seen moisturising with Nivea while Rihanna’s sultry hit California King Bed plays in the background. The Sun