Now it appears he may have let slip another of his dear friend's big secrets.
Writing on his personal Twitter account in his typically exuberant style, the Italian fashion maestro says: "Today, Jennifer Lopez. Call me.
"She ask me. To create a special dress. For her next weding! Wich color ... Do you advise me?
"I think..... Red like the fire. !!"
Rumours have been swirling for weeks now that Jennifer, 42, is planning on tying the knot with her 24-year-old backing dancer Casper Smart.
And the word is that Jennifer – who has been married three times and engaged once – is the one who popped the question.
In the past, the romantic star has been known to act impulsively. And according to reports the pair will wed during an intimate beach ceremony in Hawaii.
But other sources say the couple are in no hurry to walk down the aisle, and Jennifer's rep has been quick to deny the rumour started by the larger-than-life Italian.
Jennifer – who is currently going through divorce proceedings with her husband of six years, Marc Anthony – started dating Casper soon after her separation in July.