Synonyms of lightheartedly

2 Syllables
gladly, brightly, buoyantly, gaily
3 Syllables
willingly, merrily, readily, cheerfully, pleasantly, flashily, genially, airily, jovially, mirthfully, playfully, happily, blithely, gleefully, joyfully, laughingly, smilingly
4 Syllables
hopefully, elatedly, exultantly, hilariously, sportively, vivaciously
6 Syllables
exhilaratingly, optimistically