You can now follow us on Twitter @PopSugar for all the latest news, photos, and red carpet coverage! In this week's photo roundup, stars enjoyed birthday parties, vacations, charity events, and more — Drake stopped by to rap with Jimmy Kimmel, and Rachel Zoe got down with her new four-legged friend. Kelly and Sharon Osbourne joined Elton John for his annual charity event, while Peter Facinelli and Jennie Garth threw a themed party. Click through to see all the candid shots!