Kate Middleton played host to 150 children from The Art Room at a performance of The Lion, the Witch, and the Wardrobe in Kensington Gardens this afternoon. She wore a blue dress from Zara under a black jacket by Whistles for the occasion. Kate met with kids from various schools and actors from the play after the show. The Art Room is one of the many charities Kate is involved in as Duchess of Cambridge.

She's getting back to philanthropy after a busy string of events to celebrate the Queen's Diamond Jubilee. Kate most recently joined Prince William and the queen herself for an appearance in the East Midlands, where she played games with William and waved to the crowds from the balcony of the city's Town Hall building. Kate was able to get away from the busy Jubilee schedule for a walk with her brother, James, and dog, Lupo, last week.

Ryan Reynolds was quite the gentleman yesterday, carrying all the bags, as he and Blake Lively left a grocery store in New York. The couple shopped together, but made sure to leave separately and avoid being photographed side by side. It seems things for Ryan and Blake are going just great. They've spent much of the Summer hanging out together, and even headed to Canada to visit with his family. Blake may have to do some solo traveling, though, to promote her Oliver Stone-directed picture, Savages, before its July 6 release. Ryan and Blake are partners in life, but they're going head-to-head in our contest — make sure to vote in the PopSugar 100 for your favorite stars before the contest ends Sunday.

Jennifer Aniston and Justin Theroux popped up in Rome today! The couple are on their second stop of a European tour that kicked off in France. Jennifer and Justin explored Paris together and ate their way around town, in addition to doing some sightseeing at the Eiffel Tower and the Tuileries Gardens. They're one of the many celebrity couples who love Paris, but it seems their vacation itinerary is taking them across the continent. While we wait to see where Jen and Justin pop up next, make sure to vote for Jen in this year's PopSugar 100 before voting ends Sunday.

Gisele Bundchen snacked on an ice cream cone as she strolled through the West Village today. She's in NYC after stopping in Boston to spend time with her son Benjamin. Gisele and Ben went to a park, where she showed off what looked to be a baby bump. Her possibly pregnant stomach was on display as well during a recent trip to Brazil for the launch of Top Cufa's model search. Gisele is still the world's highest-paid model, having made $45 million in the last year, but she's since switched gears to her other passion, the environment. Gisele promoted the launch of the United Nations Conference on Sustainable Development, Rio+20, this week and shared a photo of herself working on her computer.

Stacy Keibler hopped on the back of George Clooney's motorcycle for a ride around Lake Como today. They've been hanging out all week at George's Italian getaway. George and Stacy went for a boat ride with friends on Monday and were spotted out to dinner at Il Gatto Nero on Wednesday. The couple are coming up on their one-year anniversary, and it looks like they're celebrating in style. They've had no shortage of fun travels, though, and also popped up in Mexico earlier this month.

George will have even more to celebrate if he wins the PopSugar 100, so make sure to vote for him and your other favorite stars before the contest ends on Sunday.

Leonardo DiCaprio and Erin Heatherton mixed love and exercise yesterday while on a bike ride in NYC. The couple has been hanging out in the Big Apple for the last week, enjoying cycling sessions and meals together at places like the restaurant Candela Candela. Leo and Erin checked out the musical Once as well, after the stage version of the 2006 movie picked up a slew of statues at last weekend's Tony Awards. Leo's on a break from making movies, after wrapping up work on Django Unchained and before starting up on Martin Scorsese's The Wolf of Wall Street.

Erin seems to have taken a page from Leo's book and has taken up acting, too — she recently filmed a small part in Adam Sandler's Grown Ups 2. She and Leo also share a passion for philanthropy. Erin's involved in the charity, The Global Poverty Project, and recently wrote about her involvement. Of discovering the organization, which aims to help those living in extreme poverty, Erin wrote, "In my heart I felt I found that missing link in my life, a way I could use my voice to make a difference in the world . . . I'm only 23, and while every day brings a new challenge, a new lesson and a new self-discovery, I now know that I'm on the right path. I know that I can make a difference in the world." She wrote the article for the Chicago Sun-Times, the biggest local paper for the Skokie, IL native.