The Best Twitter Feud Ever Just Erupted on @YahooOmg

It all started with our list of 18 Celebs We Loved on Twitter in 2013. Comedian Rob Delaney objected (possibly because he wasn't included). And thus sparked the greatest (slightly NSFW) celebrity thread we've ever seen between Rob and omg! Twitter honorees Anna Kendrick, Josh Groban, Olivia Wilde, Zach Braff, and The Rock. Enjoy.