Pop star Natasha Bedingfield thought romance was in the air when she met Robbie Williams - but he stood her up. The Unwritten hitmaker once bumped into Williams in a record shop and is still waiting for him to call her as promised. She explains, "Rob once said he would call me. I bumped into him in an L.A. record shop and he asked me what hotel I was staying in. He said he'd call, but never did." And the singer, who is dating U.S. businessman Matt Robinson, still hasn't given up on that second meeting with Williams. She adds, "I still think Robbie is attractive. I'd love to duet with him."