Cameron Diaz [1] and Benji Madden are definitely in love; the couple showed sweet PDA while taking a stroll through NYC on Monday, walking hand in hand and stopping for a kiss as they made their way down the street. In addition to wearing a giant grin, Cameron was also sporting a pretty gold band on her ring finger, a possible gift from Benji in celebration of her recent birthday. Cameron rang in her 42nd year late last month with a star-studded surprise party [2] attended by famous friends, including Gwyneth Paltrow [3], Drew Barrymore [4], Rashida Jones, and Lake Bell. She also celebrated earlier that week with designer Stella McCartney and pal Nicole Richie [5], who recently admitted to being responsible [6] for Cameron and Benji's relationship. About setting up the actress with her brother-in-law (Nicole is married to Benji's twin, Joel) she said, "I'm happy for anyone who is happy, and I want everyone to be surrounded with love." Keep reading to see Benji and Cameron looking more in love than ever on their NYC outing.