The "On The Floor" hitmaker has paid tribute to her two kids, twins Max and Emme, who she has with ex-husband Marc Anthony, and said they're the "lights of her life".
Taking to Instagram to share a sweet picture of the pair, she wrote: "HAPPY BIRTHDAY TO THE LIGHTS OF MY LIFE. You have brought me nothing but joy and happiness since the very second you were born.
"I am so proud of who you are and the beautiful loving caring people you are growing into. #coconuts8thBirthday. #Iloveyoubeyondforever #maxandemme #February22nd And Thank you everyone for all the beautiful birthday wishes and videos. They are so precious!! (sic)"