On Sunday, Feb. 9, the singer, 31, shared a series of photos on her Instagram as she celebrated her son Riley's 4th birthday. In a video, the proud mom can be seen carrying a Trolls-inspired cake ...

A MUM has been slammed by trolls after revealing her present haul ... And the final present was a gorgeous birthday cake that Jemma had made, which she used for a homemade cake smash.