Stars had fun all over the globe this week, whether starting their vacations or hanging with their friends, and they shared it all on Twitter. Sofia Vergara broke out her bikini in Mexico, and Heidi Klum gave a glimpse of James Bond Island. Jason Segel and Kermit the Frog geared up for a friendly game of tennis, while Justin Bieber, Jay-Z, Aziz Ansari and Kid Cudi palled around — click through Read more

This week celebrities partied publicly on Twitter! Nicole Richie celebrated her 30th birthday with Joel Madden, while Jessica Simpson whisked Eric Johnson away on a family vacation. Eva Longoria played the latest Charlie's Angel, and Heidi Klum went under the sea with John Legend — click through to see all the pics, and don't forget to follow PopSugar on Twitter for exciting news and photos! Read more

Milan Fashion Week offers plenty of glitz and glamour, and you need only look at the front-row stars — Scarlett Johansson and Heidi Klum among them — for proof. From the A-list attendees at Dolce & Gabbana's Spring showing to the amfAR festivities, we've got the best of the front-row snaps and party pics. Just click the slideshow to see celebs living la dolce vita at Milan Fashion Week. Read more

Stars tweeted from varied adventurous outings this week. Jessica Simpson and Cacee Cobb celebrated Cacee's engagement, while Heidi Klum and Seal were swept away from Sardinia on a private plane. Ian Somerhalder experienced the East Coast earthquake, and Bar Refaeli breathed in the Grecian air at dusk — click through to see all the pics, and don't forget to follow PopSugar on Twitter for Read more