And sexy.

Don't forget the sexy.

Let us once again apply my theory to the situation, shall we?

Rainbow Dash = best pony

Rainbow Dash = everyone

Therefore,

everyone = best pony.

This makes Rainbow Dash the original best pony, while also making everyone else best pony. Now everyone's satisfied!

Simple, yet effective. Everything you need for an instant cuteness overload. All you have to do is just look at a pic like this, and then BAM, instantly your heart melts into liquid rainbows. <3