Pixie Lott NOT Dating Joe Jonas

British singer Pixie Lott has denied rumours that she is dating Joe Jonas.

The pair - who met at the MTV Europe Music Awards in Berlin, Germany in November - sparked rumors of a romance when they were spotted hanging out together in LA.

Over the weekend, British tabloid The Sun reported that the two pop stars were romantically involved and JoBro had become "obsessed" by Pixie.

"He has become obsessed by her. Pixie is feeling a little more guarded but there is a romance gently bubbling away," the source said. "They have known each other a while. But she was visiting LA last week and he made sure he saw her every day. Since she got back to the UK they have been texting and calling."

However, Pixie, who has writen a song with Joe, told the News Of The World that their relationship is professional.

"He's a great guy but nothing's happening at the moment. I'm still very much single," Pixie, 20, said.

Meanwhine, the youngest JoBro, Nick Jonas seems to be awfully couple-ish with Selena Gomez these days. Check out these new pictures of Nick and Selena hanging out together.