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U.S. singer Madonna performs during her "Sticky and Sweet" tour at the Foro Sol stadium in Mexico City Nov. 29, 2008. [Xinhua/Reuters]
![U.S. singer Madonna performs during her 'Sticky and Sweet' tour at the Foro Sol stadium in Mexico City Nov. 29, 2008. [Xinhua/Reuters]](http://images.china.cn/attachement/jpg/site1007/20081201/000bcdb95f1d0a9d7c4b4f.jpg "U.S. singer Madonna performs during her 'Sticky and Sweet' tour at the Foro Sol stadium in Mexico City Nov. 29, 2008. [Xinhua/Reuters]")