You may already know who is Eleanor Calder, but in case that you do not she is a girlfriend of One Direction band member, Louis.
As well as Rihanna's best wishes Louis bandmates and family also sent their birthday wishes to the pretty brunette. Louis sent a personal shout out to his girlfriend of a year: “A very happy birthday to my lovely girlfriend @eleanorjcalder. Love you lots and lots #happybirthdayeleanor,"
And also thanked Rihanna for her very special message.
"@rihanna Thank you so so much for doing the birthday message for Eleanor!! Take care X