Get excited — Friday has arrived! It's time to review the week in celebrity viral videos! Jay-Z charms a subway-riding senior, John Travolta and Olivia Newton-John have a hilarious holiday reunion, Mariah Carey and Jimmy Fallon go Kindergarten on her Christmas classic, and more in today's addictive PopSugar Rush.
Even Katie Holmes Danced Along to the Super Bowl Halftime Show - Watch Her Best Beyoncé Moves!
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