Christina Aguilera Sings at Obama Presidential Center Opening, on Video

Christina Aguilera owned the stage for the grand opening of the Obama Presidential Center, ... putting on a powerhouse performance fit for a former president.

Xtina brought the house down in Chicago on Thursday, with a rousing rendition of "What a Wonderful World," showing off her impressive vocals and stage presence.

She stunned in a glittery, ruched dress as Barack Obama, Michelle, and a bunch of other celebs and political figures hung on her every note.

Christina is part of a star-studded lineup for the unveiling.

Also slated to hit the stage are big names like Marc Anthony, Common, Jennifer Hudson, John Legend, Bruce Springsteen, Stevie Wonder, and more.