36. Lily Allen
Why You Should Follow Her: Can be ho-hum for significant stretches, but she occasionally spikes her feed with excellent bits of real-talk contentiousness. Most recently, Allen got into a Twitter beef with Piers Morgan about appearing on his show.
"Wow, judging by your responses Piers Morgan seems to be just a little marmitey."
"Christina from Greys Anatomy is a repellent individual."