Robert Pattinson and Kristen Stewart were one on one for a date in LA on Friday evening. The two wore matching gray hoodies and stopped off at a corner store for some treats. Rob and Kristen have been inseparable since he returned from shooting The Rover in Australia last week. The Twilight costars and real-life loves posed with a fan outside a karaoke bar earlier in the week and attended a birthday party for Katy Perry's assistant. On Saturday it was a girls' night out for Kristen, who hung out with Katy and Selena Gomez at the Kids' Choice Awards. Kristen showed off her legs in a sexy shorts ensemble at the event, but that didn't save her — Kristen got covered in slime during the show!