It’s the Trending Now Top 5 Countdown for November 15, 2012 – 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 Madonna and PSY dancing Gangnam Style on stage to “Twilight” explained for math nerds, we have you covered right here on What’s Trending.

#5: Twilight for Math Nerds

#4: Fifty Impressions of Grey

#3: Madonna + Psy Give it 2 Me / Gangnam Style / Music

#2: Oz the Great and Powerful – Full Trailer

#1: Grand Theft Auto V: Official Trailer #2

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