"Ego" is a song recorded by American singer Beyoncé Knowles for the deluxe edition of her third studio album, I Am... Sasha Fierce (2008).
http://en.wikipedia.org/wiki/Ego
http://en.wikipedia.org/wiki/I_Am..._Sasha_Fierce
http://en.wikipedia.org/wiki/Beyoncé
http://en.wikipedia.org/wiki/Ego
http://en.wikipedia.org/wiki/I_Am..._Sasha_Fierce
http://en.wikipedia.org/wiki/Beyoncé
Text to this post, obtained from this song's Wikipedia page, has been slightly modified and made available here under the Creative Commons Attribution-ShareAlike 3.0 Unported License. (CC BY-SA 3.0)
https://creativecommons.org/licenses/by-sa/3.0/