not have a care in the world
sans-souci
worryless
carefreely
let it all hang out
lark
rollickingly
wanton
boisterously
happy-go-lucky
with gay abandon
happy as Larry
happy as a clam
blithesome
happy as a jaybird
lotus-eater
gather rosebuds
light-hearted
lighthearted
lightsome
blithe
bindaas
dolce far niente
rollicking
let oneself go
blithely
unbelt
angstless
get one's ya-yas out
unfreeness
contrafreeload
unhurried
at peace
go bonkers
fancy-free
carefree
unworried
devil-may-care
untroubled
rilek
get down
toddle
sunly
relaxed
breeze
graspless
chipper
debonair
jaunty
unspool