Mariah Carey or Marie Curie? A not-so-common mix-up, but one that saw quite the birthday blunder.

In a tweet, author Harriet Alida Lye explained that her cousin, Siobhan, told her colleagues in England she wanted a cake with singer Mariah Carey's face on it — a perfectly reasonable request for one's birthday. 

You'd think one of the world's most recognisable pop stars would be a piece of, uh, cake for most people to organise, but in this case, Lye's cousin received a cake featuring Noble Prize-winning French physicist Marie Curie.

"They misunderstood, and [this] is the cake they made her instead," Lye wrote. "It's Marie Curie, looking very festive." Read more...