Two of Johnny Hallyday's children are set to contest his will after discovering that he has left everything to his fourth wife, Laeticia Hallyday.
His biological son David is also contesting, the AFP news agency says.
Hallyday's death in December of lung cancer plunged France into mourning, and brought hundreds of thousands of his fans onto the streets of Paris for his funeral in scenes not seen since the death of Edith Piaf.
If the will remained valid then Hallyday would have left Laura 'no material goods, no rights to his artistic work - not a guitar, not a motorcycle, and not even the signed copy of the song Laura, which is dedicated to her'.
"I would have preferred all this to stay with the family, unfortunately, in our family it's like this", she wrote.
Her lawyers maintain the will, drafted in California, contravenes French laws that prevent children being disinherited.
Hallyday began getting tattoos in the 1990s around the time he met Laeticia in Miami, marrying her just after she turned 21 in 1996. As the BBC reports, in the event of Laeticia's death the estate will go only to Hallyday's adopted children, not to David or Laura.
Born Jean-Philippe Leo Smet, he took his stage name from an American relative and mentor, Lee Halliday, who introduced him to rock "n" roll.
During a hugely successful career spanning nearly 60 years, he sold more than 110 million records, and released 79 albums.