The singer apparently decided to keep the Robert Mouawad diamonds she borrowed and wore at a fashion line launch in Beverly Hills. A source said this about Jennifer Lopez’s decision: “We received a call from her manager informing us that Jennifer was going to keep the jewelry. As far as Mr. Mouawad is concerned, Jennifer can have whatever she wants, but a premature demand seemed presumptuous. He will lose no sleep over $50,000, and frankly, Jennifer’s endorsement is priceless.” Right… so stars now borrow jewelry to wear and have the option of keeping or returning it? What’s more, from what I understand Jennifer Lopez didn’t pay a dime for the jewelry she apparently got to keep for free. Well, maybe not exactly, but how much could her endorsement possibly value in actual cash?

Is Hilary Duff engaged? The singer/actress had dinner with her boyfriend, hockey player Mike Comrie, at paparazzi hot spot Il Sole last weekend. On her way out, the original Disney tween sensation made a point of raising her hand and flashing a ring on her engagement finger. Is that just a token of affection, a promise ring or the real deal? Is there a wedding in the near future for the Duffster? How long have they been together again? She’s still pretty young. I hope she’s not taking it too fast too soon. If they are engaged this young, maybe there’s a greater reason out there – like a pregnancy maybe.

Keith Urban has bought his pregnant wife, Nicole Kidman, a $73,000 ring to give her when she gives birth.

The country star plans to give Nicole the expensive Cartier Trinity band when the actress, who is expected to welcome her new arrival into the world this month, is in the delivery room.

A source said: “It’s three rings intertwined, so it’s very symbolic.”

The piece of jewelery represents the three stages of a relationship – yellow gold for friendship, rose gold for love and white gold for fidelity. The source added: “It’s three turned into one and that’s how it will be with Keith, Nicole and the new baby.”

Cameron Diaz and Katie Holmes, who is now married to Nicole’s ex-husband Tom Cruise, are both said to have the same ring.

After a year of dating, Uma Thurman is engaged to her rich Swiss boyfriend Arpad “Arki” Busson.

This will be her third marriage. She was married to Gary Oldman and then to Ethan Hawke who she has a son and a daughter.

No wedding date has been set so far, but friends say Arki did a good job of selecting the 8 plus caret ring.

Rihanna’s rumoured boyfriend Chris Brown has bought her a $100,000 diamond necklace.

The ‘Umbrella’ singer, who has been constantly romantically linked to the R’n'B star and was recently seen kissing him in a KFC fast food restaurant, was thrilled to discover Chris had splashed out on a ruby and diamond necklace from jewelers Jason of Beverly Hills.

Jewellery designer Jason Arasheben revealed: “Chris went for the heart theme. He said, ‘She’s going to love this because she loves hearts.’”

Rihanna, 20, was so impressed with her sparkling gift that she has ordered a diamond-encrusted cross for 19-year-old Chris from the same jewelers.

Jason added: “Rihanna gave specific instructions about Chris’ gift. She was very particular about wanting the cross to match his other jewellery.”

Rihanna was first linked to Chris in February after he attended her 20th birthday. Later that month, the pair enjoyed a romantic holiday in Jamaica and could barely keep their hands off each other while cooling off in a pool. They are also believed to have got matching star tattoos on their necks during their break.

Rihanna has previously denied she is dating Chris, insisting he is like a brother to her. She said: “We are best friends, honestly, like brother and sister. I won’t say that we’re just friends – me and Chris are really best, best friends.”

Chris also claimed he has no interest in pursuing a relationship with Rihanna, saying: “People keep asking me, ‘What’s the deal?’ I’m like,’There’s no deal. No deal.’ We’re just friends.”

Mariah Carey usually gets a lot of attention on her own but when she arrived at the Tribeca Film Festival red carpet premiere of her new movie ‘Tennessee’, there was something else that added to the media frenzy for the diva. The singer showed off a massive rock on her wedding finger. Is that an engagement ring? The 38-year old curvaceous diva has been quietly dating actor Nick Cannon for a few months now. Is there something that the quiet couple wants to say? Or is this just another way for Mariah to get more attention? If she heard of the supposed paparazzi boycott on her, it may very well be.

Oh my God! Ashlee Simpson and Pete Wentz just turned into the music industry’s version of Heidi Montag and Spencer Pratt with this obviously staged picture moment in New York City this past Wednesday. The rumored mom-to-be and her bassist of a groom-to-be were photographed just by the lobby of their hotel sharing a very fake and so-called intimate moment. But really, all it really turned out to be was a chance to show off her giant diamond engagement ring. We all know she’s engaged and she doesn’t need to show off her rock! We want to know if she really is pregnant so I’d rather she just give a fake moment of Pete holding onto her tummy.

She may be the cause for the early demise of the Pussycat Dolls but Nicole Scherzinger is still a performer. The lead Pussycat Doll turned solo artist was carried on to the stage for her performance at ‘Movies Rock: A Celebration of Music in Film’ which was held at the Kodak Theatre in Hollywood on Sunday.The 29-year old singer gave a surprise performance of ‘Diamonds are a Girl’s Best Friend’ which was famously performed by Marilyn Monroe in the 1953 film ‘Gentlemen Prefer Blondes’. Nicole even wore a pink dress similar to that of the blonde bombshell’s.

Catch the performance when the show airs on Friday, December 7 at 9PM ET/PT on CBS

Jennifer Lopez is coming out with a new fragrance. She recently had an interview on how and why she created the perfume ‘Deseo’, which is Spanish for desire. She says that she was inspired by the scents in her garden and that she thinks the perfume industry is going good right now with the many other artists releasing fragrances.

The perfume is due out in February and is a mix of scents of “watery bamboo leaves, garden yuzu, Sicilian bergamot and freesia; the heart is composed of star jasmine, pink geranium flower, orange blossom and French mimosa, and the drydown is of warm amber, oak moss, sensual musks, creamy sandalwood, atlas cedar wood, patchouli and mineral accord”.

You can get it in a pretty nifty bottle which is in the shape of a “diamond in the rough”.