One idea could be getting her a ticket to a Rihanna concert, if there is one coming up in your city or nearby. Another idea could be a framed poster or print of Rihanna to hang in her home, or a piece of Rihanna merchandise (such as a t-shirt or hoodie) from a trusted source. If your mom enjoys reading, you could also consider getting her Rihanna's autobiography "The Rihanna Book" which includes never before seen photos and stories from Rihanna's life.
Or you can get her a star map with the date when she was born.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.