Robert Pattinson hit up Jay Z and Justin Timberlake's concert in LA last night with singer Sia Furler. The duo was spotted leaving the concert together, with Rob making an exit while wearing a Supreme baseball cap and Sia dressed in an all-black ensemble. Sia tweeted about the night out after the concert, saying, "Saw jiggles and JT tonight at the rosebowl. SO AMAZING. Jiggles!" This isn't the first time that Rob has connected with the Australian singer, as she revealed back in 2009 that Rob once sang for her and that "he can actually sing." Robert was hardly the only star at the big concert last night as Jessica Alba and her husband, Cash Warren, were spotted at the event. Robert is back in LA after wrapping up filming for Maps to the Stars in Toronto last week.