Katy Perry followed closely behind Russell Brand last night as they touched down at LAX. She's back in the States following an appearance during Paris Fashion Week and a string of concerts in England. Russell has likewise been busy promoting his upcoming movie Arthur, and in interviews has been dishing about his and Katy's intimate wedding as well as the "epic promiscuity" in his past. Katy's returning to the UK soon for a performance in Manchester, but she's most riled up about a big shin-dig taking place in London next month. It seems she and Russell were left off the royal wedding guest list, though Victoria and David Beckham will be on hand for the biggest event of the year. Katy's so intrigued by William and Kate's nuptials that she even joked about crashing.