Justin Timberlake had a date night with Jessica Biel — casting doubts on reports that he’d dumped her for Rihanna. Us Weekly reported yesterday that Timberlake had dumped Biel over the phone, while Star claims he’s turned up the heat with Rihanna. But Timberlake and Biel were photographed holding hands Monday night, even though they sure weren’t smiling. A source said, “They’ve spent the last few days vacationing together in Santa Barbara. Things have been rocky in the last few months, but they are working it out. And this rumor that Justin was hooking up with Rihanna is wild — they’ve been working on a track together.”