Nigerian singer Tiwa Savage celebrated her birthday on February 5.The singer posted a photo of herself, on a balcony in black with red cloth (blankie) around her.She captioned her photo, “44-4 🙏🏾” – a post many of the followers said was a math problem that revealed her age, 40.Some fans were surprised the singer had turned 40 with one explaining, “she looked sexy and more than beautiful.”Many of her celebrity friends and social media followers flooded the artiste’s Instagram page with heartwarming birthday wishes.Ghanaian singer Efya, Omotola Jalade-Ekeinde, Adedamilola Adegbite, Jane Michael, Moesha Boudong and many other stars also wished Tiwa Savage well. Read some of the comments below:(credit: adomonline.com)