Reality TV star Paris Hilton is suing a card company for allegedly using her likeness and trademarked 'That's hot' phrase without permission. The hotel heiress filed her lawsuit against Hallmark Cards in Los Angeles' Federal District Court on Thursday (06Sep07), citing invasion of privacy and misappropriating her image. She is seeking more than $500,000 (GBP250,000) in damages and a permanent injunction preventing Hallmark from further using her name and likeness. According to the lawsuit, Hallmark's card features Hilton's face superimposed on top of a cartoon waitress serving food. The catchphrase reads: 'Don't touch that, it's hot. What's hot? That's hot.'