Justin Timberland gushes about fatherhood, says it's the most amazing thing ever'

The singer, 34, who appeared on US talkshow, the Tonight Show with Jimmy Fallon, gushed about fatherhood, calling it the most insanely amazing thing to ever happen to him! 

'It is the most insanely amazing, wonderful, unbelievable thing to ever happen to you.'

He then claimed that his 5 months old son's first word was 'dada'. Then he shared photos of the cutie!