 2009 and 2010 saw him perform at BBC Proms concerts which were broadcast live on BBC Television via the Red Button
During 2011 Christos appeared fleetingly with Jenny Williams on Britain's Got Talent, their performance being farcically interrupted when a dog strayed on to the stage.Christos has performed at a number of high-profile sporting events, including appearances at the Powergen Rugby Cup Final, the 2009 England vs Scotland 6 Nations Championship Rugby Union game at Twickenham along with Jonathan Ansell, the Heineken Cup Final at the Millennium Stadium in Cardiff and was credited as the first man to sing at the new Wembley Stadium.In 2008 he sang at the opening ceremony of the FINA World Swimming Championships at the Manchester Evening News Arena, and also at a tribute to some of Great Britain's Olympic and Paralympic medalists, including three times cycling gold medalist Chris Hoy.