Spotted: Oprah Winfrey, Jennifer Hudson And Mary J. Blige Walk On

Every day a multitude of stars wander through the halls of MTV News to talk about their latest projects and goof around with our intrepid correspondents. But sometimes we catch stars elsewhere, and that's why we put together Spotted!, a daily compendium of stars in the wild.

Did you properly celebrate Mother's Day over the weekend? Here's hoping you chatted with your mom, bought her some flowers or took her out to dinner. Of course, Mother's Day is also a time to reflect on the health of women, which is why Major League Baseball paid tribute to breast cancer research with the use of pink bats on Sunday (May 9). There was also an event in New York that supported the health of mothers: The "Live Your Best Walk" hosted by Oprah Winfrey. She teamed up with a number of different famous friends (including Mary J. Blige and Jennifer Hudson) to not only celebrate the 10 year anniversary of her O magazine but also to raise money for 10 different charities. It was a chilly day in New York, but it didn't stop Winfrey, Hudson and Blige from getting out and strutting their stuff.

They weren't the only stars on the street over the weekend, as Christina Aguilera floated around Manhattan following her appearance on "The Oprah Winfrey Show" on Friday afternoon and Perez Hilton and Russell Brand hung out in Los Angeles. Click here for these photos as well as the entire "Spotted!" archive, which features over 400 candid shots of stars like Britney Spears, Jessica Simpson, the Jonas Brothers, Justin Timberlake, Miley Cyrus, Jay-Z, Katy Perry, Justin Bieber, Lady Gaga, Rihanna, Shakira, 50 Cent and Madonna!