Robert Pattinson refuses to rule out a professional singing career - but he's too scared to release his songs.

The Twilight hunk has frequently mentioned his love of music, and showcased his stunning vocals on the movie's soundtrack.

He even performed a secret impromptu mini gig in London earlier this year (09), but is worried about releasing solo music professionally - unless his film roles dry up.

Pattinson says, "I do do a bit (of singing) but I don't really release it. I'm too scared. Maybe one day. I think you can only concentrate on one or the other. Once I� 39;m ready to do it, I'll do it again, I'll perform again."