This Mariah Carey fan’s “One Sweet Day” turned a little sour when her co-workers “misunderstood” her cake decoration request.

A woman in England reportedly asked her colleagues for a Mariah Carey cake for her birthday — however, she instead received a Marie Curie cake.

'PATHETIC' FROG BIRTHDAY CAKE FROM SUPERMARKET LEAVES PARENTS 'MORTIFIED': 'IT WAS A DISGRACE'

According to the woman’s cousin on Twitter, the colleagues misunderstood the request for the Grammy-award winning singer and created the cake to feature the two-time Nobel Price-winning scientist.

Those on Twitter were tickled by the mix-up and left a variety of pun-filled comments referencing the late scientist and her work with radiation.

CLICK HERE TO GET THE FOX NEWS APP

Even Carey herself responded to the hilarious mix-up on Twitter, stating she could have been Marie Curie – if she passed math class.

FOLLOW US ON FACEBOOK FOR MORE FOX LIFESTYLE NEWS

Carey is currently celebrating the birthday of her debut studio album, which was released this month in 1990.