Leonardo DiCaprio and his Victoria's Secret model girlfriend Erin Heatherton had their latest loved-up afternoon out in LA yesterday. We had a first glimpse of the couple together last week, when they were spotted checking out a museum in Sydney. Leo had been in Australia on and off for the last couple months working on Baz Luhrmann's adaptation of The Great Gatsby, but it seems a holiday break has allowed the 37-year-old actor to go back to the states. Leo's home base in the US is in LA, but 22-year-old Erin's a native of Skokie, IL.

The last 12 months have been full of new romances for Leo. He and longtime love Bar Refaeli broke up over the Summer, and he soon started seeing Blake Lively. Leo and Blake were among 2011's cutest new couples, but they split after just a few months. Now Leo's back in the model dating game, and during the tail end of 2011 has been linked to Australian model Alyce Crawford and Romanian Madalina Ghenea. He also apparently took a liking to Erin's fellow Angel, Karlie Kloss, following the big VS show back in November.

Gwen Stefani and Gavin Rossdale brought Kingston and Zuma to the movie theater to check out Alvin and the Chipmunks: Chipwrecked in Sherman Oaks, CA, on Thursday. The Stefani-Rossdale family has been getting into the holiday spirit with festive outfits for the boys and even mom. Gwen wore head-to-toe red and green plaid to go shopping in LA earlier this week. It's been another exciting year for Gwen, Gavin, and their boys, and to celebrate, we took a look back at the cutest Stefani-Rossdale pictures from 2011. 2012 is already shaping up to be exciting as well — Gwen's No Doubt album is finally expected to be released.

Ryan Phillippe had a lady by his side for lunch at Hugo's in LA yesterday. Ryan has been seemingly single since splitting with Amanda Seyfried earlier this year, but it appears that he's finishing off 2011 with a new girl. Those weren't the only developments in Ryan's personal life over the past 12 months; he also became a dad again when his ex Alexis Knapp gave birth to his baby girl. That was just one of many surprising pregnancy announcements of 2011, joining that of Beyoncé Knowles, Jessica Simpson, and January Jones, to name a few. Ryan has yet to speak publicly about the arrival of his younger daughter, though the little one does officially have the last name Phillippe.

Gisele Bundchen had her hands full of bags as she stepped out of her Boston home on Thursday. The weather has been unseasonably warm in the Northeast, which probably means it won't be a white Christmas for the Brady family this year. Before spending Dec. 25 with his wife and their son Benjamin, Tom will take the field with the Patriots on Christmas Eve. They're facing off against the Miami Dolphins, and Tom's Pats are already a lock to make the playoffs. The Patriots haven't actually won a playoff game since 2007, however, so we'll see whether they'll finally be able to break that bad streak.

While Tom and Gisele call Massachusetts home during the season, they are still building their dream home in LA, and the massive Brady mansion is apparently almost compete. Gisele's job continues to take her around the world and her latest international campaigns were recently released. Check out Gisele for Givenchy and the rest of the Spring 2012 campaigns on Fashionologie.

Even with the holidays fast approaching, celebrities were busy this week! Tom Cruise had Katie Holmes by his side for the NYC premiere of Mission: Impossible — Ghost Protocol while Jessica Simpson continued her hunt for the perfect wedding dress. Stephanie Seymour escaped the cold in St. Barts and Kate Middleton turned heads in a glamorous Alexander McQueen gown. That's not all that happened this week — click through to see all the best pictures and biggest stories!

It's been a big year for Britain's royal family. April 29 brought the wedding of Kate Middleton and Prince William, now known as the Duke and Duchess of Cambridge. From there, the couple embarked on a whirlwind second half of the year. They traveled across Canada, to the US, and continued to dress up for fancy parties in London. They're equally at home in Wales, where William has been stationed with the Royal Air Force. Their union has kicked off a global infatuation with the royals — and we've rounded up their cutest moments of 2011!

Also, don't miss all our Best of 2011 coverage across the PopSugar Network!