Christina Aguilera and Matthew Rutler stepped out for a rare appearance at the Breakthrough Prize Ceremony in Los Angeles ...

Looking back on her rise to stardom, she told the magazine, 'I was never gonna win because I had someone like Britney [Spears] and Christina [Aguilera] ahead of me, who were selling so many more ...

Christina Aguilera's performance at a Russian ... Aguilera has previously offered master-class workshops to help other singers for $90 a class online, per Billboard. "This class is for all the ...