"Throughout life you will meet one person who is unlike any other," read the message which appears on what is thought to be Lauren's personal Instagram account. "You could talk to this person for hours and never get bored, you could tell them things and they won't judge you. This person is your soulmate, your best friend. Don't ever let them go."
"True friendship and true love are rare like diamonds," read another post which was uploaded around the same time, when Lauren returned from a New Year holiday in the Caribbean with Simon and her husband Andrew Silverman. "To be cherished and treasured and to be held onto with all you've got. Be kind. Love with raw passion and with all your heart. And finally strive to learn and practise the act of forgiveness."
The messages, which are thought to reference to Lauren's relationship with Simon, come amid reports that that X Factor judge was named in the Silverman's divorce papers.
While Lauren has kept a low profile since news of her pregnancy broke at the end of July, the 36-year-old has been seen in New York displaying her growing baby bump.
The mother-of-one also released a statement saying that her son was her main focus for the time being.
"My top priority is protecting my seven-year-old son while working to resolve all outstanding issues with my wife," read the statement. "Hopefully people can respect the interest of our child during this process."
Lauren and her husband Andrew had a long-standing close friendship with Simon.
Simon is believed to have met Lauren and her husband while on vacation in Barbados seven years ago. They holidayed together on a number of occasions, during Simon’s relationship with Terri Seymour and later Mezghan Hussainy.