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.

Twitter is really the only thing out there that makes me think that "it" does not in fact "get better". — josh groban (@joshgroban) December 16, 2013

@joshgroban Don't be sad Groban, I was kidding, I do know who you are. (I love "Just Haven't Met You Yet") — Anna Kendrick (@AnnaKendrick47) December 16, 2013

Dear @joshgroban it's my turn to stand on the mountains. You raise ME up! cc: @AnnaKendrick47 — Zach Braff (@zachbraff) December 17, 2013