being in a happy,jolly state of emotion. or just being a complete freak having bursts of fun at random moments
girl 1: i got to go to the bathroom. *skips of to bathroom singing lalala*
girl 2: uhhhhh....
girl 3: i think shes in lalaland.
*girl 2 and 3 go running after girl 1 to save her from further embarrasment*