Carly Rae Jepsen is being sued over 'Call Me Maybe'.
A Ukranian singer, Aza, is filing a lawsuit in Los Angeles, claiming the Canadian star's mega hit copies her track, 'Hunky Santa'.
The lawsuit claims the festive themed song - recorded in English - has the same lyrical basis as Carly's track, and was taken without consent.
Former Miss Ukraine Aza told TMZ.com: ''I'm shocked and surprised that these people wanted to sample my lyrics on their song.
''They didn't ask me for permission, they just took it. That's why I filed this lawsuit. When I first heard it on the radio, I was driving and almost got into an accident. I couldn't believe what I was hearing.''
The lawsuit is seeking substantial damages to compensate Aza.
Representatives for Carly, 26, deny her track is in any way related to 'Hunky Santa'.
A representative said: ''This is completely false and Carly's lawyers will deal with this. Everyone knows Carly is a songwriter. She is not spending a lot of time listening to Ukrainian radio.''
'Call Me Maybe' hit the number one spot in more than 15 countries around the world earlier this year.
Here for your listening 'pleasure' is Hunky Santa. Full marks to anyone who can spot the resemblance to 'Call me maybe'
WARNING: This video is almost un-listenable, but also contains imagery that might be offensive to some.