The visual began with a snippet from their track “Scream & Shout," from Will.i.am's 2013 album #willpower and marked the pair's second collaboration after 2011's "Big Fat Bass" under Spears ...

Ask Smithsonian: What’s Up With Willpower and Why Don’t I Have It? Want better willpower? Learn how to just say no with this step-by-step guide on boosting your self-control. In this one ...