Christie Brinkley wants marriage to have a five-year boredom clause

Christie Brinkley believes marriages should be reviewed every five years

Christie Brinkley believes marriages should be reviewed every five years so couples can split up easily if they get "bored".

The 71-year-old model - who has been married four times including to music legend Billy Joel - is convinced couples should be given the option to end their unions without having to go through lawyers by reviewing their relationship every few years.