I love when celebrities do great things for random non-famous people. Unfortunately I don’t get to write about that nearly as much as I’d like, as it doesn’t happen with the frequency I’d like. But the latest one is really a doozie; a woman in New York City has found a bone marrow donor in thanks in part to the help of singer Rihanna. Attorney Lisa Gershowitz-Flynn, 41, found out she has an especially aggressive form of leukemia called Acute Myelogenous Leukemia right after Thanksgiving. Only one in five patients end up get a bone marrow transplant because it’s so hard to find a donor. Gershowitz-Flynn’s family and friends started a group, GiftForLisa.com, to try to get as many people to volunteer bone marrow as possible. Rihanna helped get the word out about Lisa’s desperate need for a donor, and the publicity she gave to her cause brought national headlines and a huge increase in the donor registry.

“When I heard about Lisa [Gershowitz Flynn]’s plight, my heart broke,” Rihanna tells PEOPLE exclusively. “I said, ‘I need to get the word out about Lisa right away.’ ”

Specifically, Rihanna is working with DKMS – the world’s largest non-profit marrow donor center to help raise awareness for the need for people to come forward to become donors.

[From People]

Lisa has luckily found a donor, even though the odds weren’t looking good.

“Today a 32-year-old guardian angel consented to be my donor, even though in all likelihood she has never met me and does not know who I am,” Lisa Gershowitz-Flynn, 41, a lawyer, wrote in an email to supporters Thursday.

“While we cannot verify the source of the donor,” Flynn adds, “this angel was most likely found through the efforts of my family and friends, as well as complete strangers who heard about my story and took it upon themselves to aid in the effort to find a donor.”

[From People]

DKMS says that not only did they find a matching donor for Lisa, but they registered an additional 2,000 people. Becoming a bone marrow donor is incredibly easy; all you have to do is have a painless cheek swab. Your DNA goes into the registry, and should you be a match for someone and wish to donate, a donor would undergo a minor outpatient surgery, which would extract healthy stem cells that would replace the cancer patient’s unhealthy cells. It’s an amazing way to save someone’s life. Several other celebrity moms got on board and championed Lisa’s cause, including Kate Winslet. Talk about good celebrities.

Here’s Rihanna at the Brit awards on 2/20/08. Images thanks to PR Photos.

Ladies, you know you’ve done it: sitting in a circle of your best girl friends, you flip to this month’s Cosmo quiz and all of you reveal your answers. Well, celebrities do it, too. This month’s quiz taker is singer Rihanna– and some of her answers might surprise you.

In the quiz, Rihanna reveals that she’s dying to work with Hugh Jackman, misses her friends back home in Barbados, and wishes she had more time to sleep. She claims that a dealbreaker in a relationship is “when a guy doesn’t treat his family right.” She also admits to a huge crush on “Pirates of the Caribbean” star Orlando Bloom, confesses that nude scenes in movies are, “HOTT,” and that she’s never owned a car.

As for Rihanna’s assessment of her body, a hallmark of any Cosmo quiz, she says her best feature is her butt, while she gets the most compliments on her eyes. She rates her figure as “not perfect, but it’s real,” and admits that she is insecure about her eating habits because “a girl like me can only have so many french fries.”

Probably the most surprising answer on the quiz was to the question, “If I could trade lives with another woman for a day, it would be…” Rihanna answered Kate Moss.

Say what?

Sure, Kate’s a supermodel, but she’s also a mess. And she’s had sex with Pete Doherty. Why would Rihanna want to deal with that kind of horror? I don’t think she knows who Kate Moss really is. I think she meant Kate Hudson. Or maybe Kate Beckinsale.

You can see Rihanna’s quiz here. Rihanna was also profiled in this issue of Cosmo, and appears on the cover. Who needs to be Kate Moss when you can be on the cover just by being yourself?

Picture note by Celebitchy: Rihanna is shown arriving at the Chanel fashion show in Paris on 2/29/08, thanks to PRPhotos.