The worlds of 3G telephony and UK garage collided today, as Craig David surprised delegates with an appearance at the 3GSM World Congress in Barcelona.

After performing a song, the singer and former DJ spoke on the subject of mobile audio content.

"The music industry has gone from vinyl records to CDs and is now moving to mobile devices," said David. "We all need to work together on this new channel – musicians, recording companies, handset manufacturers and mobile phone operators alike."

Whatever next: Bill Gates duetting with the Artful Dodger?