" Express " received generally favorable reviews from music critics , who praised its both old-school – and – contemporary sound . It attained moderate chart success , peaking at number two on the US Bubbling Under Hot 100 Singles and also charting in other territories . Aguilera performed the track at the American Music Awards of 2010 and during her Vegas residency The Xperience
American Music Awards of 2010
American Music Awards of 2010
Express (Christina Aguilera song)