Singer Christine Fan performs during one of her world tour concerts at the O2 Indigo in London, capital of Britain, March 26, 2013. (Xinhua/Tang Shi) 

Singer Christine Fan performs during one of her world tour concerts at the O2 Indigo in London, capital of Britain, March 26, 2013. (Xinhua/Tang Shi) 

Singer Christine Fan performs during one of her world tour concerts at the O2 Indigo in London, capital of Britain, March 26, 2013. (Xinhua/Tang Shi) 

Singer Christine Fan performs during one of her world tour concerts at the O2 Indigo in London, capital of Britain, March 26, 2013. (Xinhua/Tang Shi)