Robert Pattinson hat sunglasses plaid twilight Back in LA for the Teen Choice Awards, Rob wasted no time in hooking up with his on-and-offscreen love Kristen at the Chateau Marmont Thursday night!

According to RadarOnline, the pair reunited in a suite at the Chateau, but they weren't entirely alone...at least not at the beginning!

A source spotted Kristen, Rob and Rob's pal Marcus Foster entering the room Thursday evening. At about 8:45, a guitar was brought up to the room. Awwww, think Rob serenaded Kristen?

The trio snuck out of the Chateau, and headed to the Hotel Cafe to check out the Bobby Long show. But they were only there for a bit, because at 10:30, Rob, Kristen and Bobby hailed a cab and hoofed it back to the Chateau.

Marcus left at about 1:30, but Kristen and Rob never emerged, spending the night there together!

Will Sunday night's awards finally give us the "outing" of Robsten that we're all dying to see? Or will they continue to play coy, like they did at the MTV Awards, and Comic-Con?