Naomi Campbell and Vladislav Doronin on a `break`?

New York: Supermodel Naomi Campbell and her Russian billionaire boyfriend Vladislav Doronin have reportedly taken a break from their relationship. Campbell, 42, has been with Doronin for around five years but it is believed their relationship has hit the rocks and they have decided to temporarily separate, reported New York Post. The pair was last seen together on Miami Beach in March. Doronin was seen most recently in the company of a beautiful blonde. "Naomi and Vlad have broken up, and he`s been out partying in New York. Naomi and Vlad have a complex relationship, and sometimes break up and make up ... They spend a lot of time apart due to work commitments," a source said. Campbell has had numerous work commitments over the past few months with her modeling competition show `The Face` proving to be a huge hit in the US with a UK version now currently taping which kept her apart from the hotel and property mogul. Despite their separation, the catwalk queen is expected to invite Doronin, 50, to her 43rd birthday party on May 22 in Ibiza. PTI