The singer is seven-months pregnant and revealed that her other half, Sam Cooper, has started referring to her as the rotund character off Thomas the Tank Engine.
Taking to Twitter, the outraged star told her fans, 'My husband just called me his 'little fat controller' like off of Thomas the Tank Engine, so not LOL.'
The 26-year-old, who married Sam in a country ceremony in June, has previously admitted that her baby bump is starting to get the better of her.
'I can't cross my legs any more, is that normal?' she wrote.