Justin Bieber takes us around the world, and Demi Lovato gives us a "Heart Attack."

April 12, 2013 The Comment Show Our new series unleashes comedian David So on anyone who has been mouthing off in online posts about music videos. It's all in good fun, but believe us, no one is safe in 'The Comment Show.' Justin Bieber You've gotta see JB the showman, pleasing Beliebers with his stage work in "All Around The World." Demi Lovato We've been waiting for "Heart Attack," and it's finally here. Get ready to sing along! J. Cole He's a jealous dude, and that means big trouble for his pal Miguel in "Power Trip." Krewella They killed at Ultra, and "Alive" is an EDM hit. Find out how they first connected in our exclusive interview. Stay connected. Contact us at feedback@vevo.com.

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