Eagle-eyed fans also noticed that Phoebe wore a rose gold and diamond Cartier ring on her wedding finger in place of her diamond engagement ring.
The new mum is reported to have split from her NRL star husband Sam Burgess just three weeks after giving birth to their second child Billy Mark.
Sam reportedly called time on their marriage just before Christmas and his wife was from all festivities.
A source close to the pair told The Daily Telegraph that “things have been bad for a while”.
“They tried to keep it together but it all went to s**t, that's the honest truth. It is pretty messy,” the source said.