Even with Halloween right around the corner, stars were out and about around the world this week. Matthew McConaughey, Anne Hathaway, and Jessica Chastain continued promoting Interstellar in London, and Jared Leto and Alessandra Ambrosio showed off their enviable locks at a boutique opening. Ben Affleck flexed his muscles in LA, while Adrian Grenier showed off his abs on the beach in Miami. Carrie Underwood concealed her baby bump in a blue dress during an appearance in NYC, where Taylor Swift was also busy promoting her new album, 1989. Keep reading to see all that and more of the best Celebrity pictures this week - so far!