Justin Timberlake Mentions Britney Spears While Playing the 5 Second Rule Game on Ellen

Justin Timberlake proved he's pretty quick on his feet when he played the 5 Second Rule game on The Ellen DeGeneres Show on Friday. After gushing about his "rad" son Silas, the singer went head to head with the host as they tried to come up with three quick answers to a series of questions asked by Mario Lopez. While Justin had an immediate response to how he's bringing sexy back, things got pretty awkward when he revealed that he keeps a bite guard in his bedside table. "I'm a grinder," he said with a smile. "I don't see nothing wrong with a little bump and grind." He also mentioned his famous ex Britney Spears when Mario asked about his time on The Mickey Mouse Club. Watch it all go down in the video above.