The former couple - who split in July after seven years of marriage - had agreed an amicable arrangement where the `American Idol` judge was primary carer of three-year-old Max and Emme, but the Latin singer is now said to be seeking joint custody.
The 23-year-old pop star will start work on the tome in January and it will tell the story of her life from her childhood through to her incredible success with N-Dubz and her landing a judging role on `The X Factor`.
The `Will and Grace` star ended her 11 year marriage to producer Daniel Zelman earlier this year, but the pair remain close and committed to their seven-year-old son Roman.
The devastated showbiz patriarch has thrown himself into work with the Amy Winehouse Foundation - which he set up in memory of his daughter, who was found dead at her London home in July aged 27 - to help cope with his grief.
The Westlife star`s wife, Wonderland singer Jodi Albert, gave birth to their first son on 20.12.11.
The `Down for Whatever` singer has been based in the UK while judging pop star search show `The X Factor` in recent months but now the TV series is over, she is looking forward to a family Christmas in the US.
The Oscar-winning actress - who adopted little Louis in January 2012 when he was a newborn - admits the tot has already developed an eye for the ladies, which can sometimes cause her embarrassment.
The 38-year-old actress` husband Len Wiseman is keen on the idea of them having a baby together but the `Underworld` star - who already has 12-year-old daughter Lily with ex-partner Michael Sheen - is cautious having seen friends go through the "tragedy" of miscarriage.
The 22-year-old actor is starring in his first movie, horror flick `The Woman in Black`, since the `Harry Potter` franchise ended, and although he has been learning a lot on set he admits he still panics about his own ability from time to time.
The 85-year-old Playboy founder was shocked when his former girlfriend called off their wedding just days before they were due to tie the knot in June, but the media mogul is grateful she took action when she did as he thinks he "misjudged" their romance.
The Oscar-winning actress` six children - Maddox, 10, Pax, eight, Zahara, six, Shiloh, five, and three-year-old twins Knox and Vivienne - can all speak the language fluently and she wants to able to keep up with them so is having lessons.
The `Marry the Night` hitmaker was so delighted to hear her UK driver was about to become a dad for the first time that she splashed out on the practical gift for him.
The TV star got engaged to rock star Thomas Cohen earlier this year but she says they have no plans to tie the knot in the near future.
The `Baby` hitmaker explained his mother, Pattie Mallette - who raised the 17-year-old singer singlehandedly - wanted to be "straight up and honest" with him, and was concerned he would think she was a "liar" when he later found out Father Christmas wasn`t real.
The `On The Floor` hitmaker has recalled her panic at finding the bump on the head of her daughter, who is now three, shortly after she and her twin brother Max were born and she was so worried she and her then-husband Marc Anthony rushed her straight to hospital.
Over 540 items from the late `Thriller` hitmaker`s rented mansion were auctioned off at the weekend, with the armoire, bearing a pencil-written note reading "Train, perfection March April Full out May" - believed to be a reference to the rehearsals for his 50-date London residency at The 02 arena - among the highlights of the sale.
The `Hold It Against Me` singer threw a joint engagement and 40th birthday party for her fiance Jason Trawick at the Chateau club in Las Vegas, spending money on Dom Perignon champagne and a chocolate fountain to adorn the room.
The 33-year-old star tied the knot to model bride Rochelle DeAnna Karidis in a gothic-themed ceremony in a clear tent at the Beverly Hills Hotel, California, on 18.12.11.
The `Devil Wears Prada` star - who developed the speech impediment at the age of seven - rarely struggles to speak in front of strangers but admitted she sometimes has problems getting her words out in front of family and friends.
The 44-year-old rocker - who has been with his wife Sara McDonald for 11 years - admits he thinks of himself as a great husband because he is not a "lad" and doesn`t do "boys" things".
The rapper`s wife Beyonce Knowles is pregnant with the couple`s first child and Jay-Z is so determined to keep the child safe, he has asked Tom Cruise for advice on the safest mode of transport for the family.
The `We Bought A Zoo` actress met the Tribes guitarist when she was shooting in London recently and pals say the pair are smitten and determined to make their long distance relationship work.
The singer-and-actor would love to take a year off work, but is too busy so is trying to schedule a three-month holiday, though he admits he is astonished by how "lazy" he gets after a few days off.
The Hollywood heartthrob says he was never part of any group when he was growing up and just used from one gang to another as it helped him romance as many girls as possible.
The `Lucky Day` singer believes she is a "true friend" to her Girls Aloud bandmate because she wasn`t afraid to help her pal out when disaster struck on a night out.