ALL you need is laugh-ter.
That's the No.1 smash hit from the new 'Fab Four' - a quadruple of laughing toddlers at a daycare centre in the US.
Footage from Learning Lodge Daycare in Texas shows the bubs setting off a chain reaction of infectious laughter, bouncing, and a good old enjoyable shale of the head.
The video has been an instant hit with viewers, watched over 17,000 time on Facebook.
But if anything, it goes to show sometimes all you need is a good chuckle with friends.