Rihanna in Stella McCartney for Red Nose Day Marilyn Monroe t-shirtRihanna is showing her support for Red Nose Day! Stella McCartney, who Rihanna counts as a friend, shared this pic of the singer rocking nothing but her beloved diamond estate necklace from Kentshire and a Marilyn Monroe tee from the organisation. Red Nose Day raises funds for different charities across the United Kingdom and Africa. The Marilyn t-shirt is sold out but you can still support a good cause by buying one of the other tees that Stella McCartney designed from their online store.