Laughs. Donald Trump and Russell Brand attack each other on twitter

Billionaire businessman Donald Trump took to twitter  yesterday to bash British comedian and actor Russell Brand after watching his appearance on 'Late Show with David Letterman'. Donald also called out Katy Perry for marrying such a 'loser' and a 'waste. If Donald thought Russell would take the insult lying down, he thought wrong. Russell came for him. See their tweets after the cut...

And Russell replies...