The British singer was star-struck when she stood alongside the 'Twilight' hunk on the red carpet at the UK premiere of the film in London's Leicester square and was left red-faced by his mere proximity.
Asked about her dream date, Amelia gushed: ''Ashton Kutcher, I'd faint if I met him. And Robert Pattinson. At the 'Twilight' premiere he was inches away from me.
''I was getting interviewed and all these journalists were laughing at me because I couldn't stop staring at him. He was getting interviewed and I didn't want to distract him, but he was beautiful.''
The feisty 'You Bring Me Joy' himaker was less complementary about her fellow 'X Factor' alumni Harry Styles, however, and said she would never be interested in the One Direction star even now he has split from Taylor Swift.
She told OK! magazine: ''Have they broken up? Were they even together? It's got nothing to do with me. It's not my business. I could not tell you what went on. But Harry Styles, I'm not really a fan. He's a friend, I really get on with him but not in that respect.''