Rainbow Dash knows what's up. Gotta love that Bully soundtrack.

Bullyshy by DoubleWBrothers
http://doublewbrothers.deviantart.com/art/Bullyshy-501146817

Rainbow Dash was voiced by Warriorcatcloudtail5
https://www.youtube.com/user/Warriorcatcloudtail5

"Dumb-Bells" was voiced by solidmario64
https://www.youtube.com/channel/UCAc5bUGm2qdkdR1iIthuNFg