It’s the Trending Now Top 5 Countdown for March 21, 2013 – where we gather the hottest and most outrageous must-see YouTube videos hitting the web today and send them all straight to your screen. It’s like watching the best of YouTube — only faster!
From Obama's NCAA bracket to the new "Star Trek Into Darkeness" trailer, we have you covered right here on What’s Trending.
#5: Sifl and Olly Video Game Reviews - Episode 1
#4: TIE: Barack-etology / Kid President NCAA Tournament Bracket 2013
#3: Star Trek Into Darkness - International Trailer
#2: Imaginary Friend Photo Prank
#1: Tina Fey Revives Sarah Palin Impression on Inside the Actors Studio