Check out what's trending today on YouTube

A new Epic Rap Battle pits artists against ninja turtles...and all the other comedy clips that are racking up the LOL's on the web right now.

Train's back and they're crooning about angels and blue jeans. Check out the videos that're leading the pack of hot music tracks on YouTube.

Hot off the (Hollywood) presses: new teasers for Dr. Who, Hunger Games, and TMNT.

Stop what you're doing and watch these heroic pups in wheelcarts chase a stick. Plus other cute animals doing cute things.

Dave Letterman walks out on Joan Rivers, and everything else that's burning up the late night circuit.

The gaming vids that are currently #winning on YouTube.

The heartwarming tales and random acts of kindness that are trending on the web right now.

The most popular (and entertaining) explainers, how-tos, and life hacks.

Videos that tackle life's big questions (and stuff you never thought to ask).