THESAURUS
gladly
airily, blessedly, blissfully, blithely, cheerfully, cheerily, delightedly, ecstatically, elatedly, exultantly, genially, happily, hopefully, irrepressibly, jauntily, joyfully, jubilantly, lightly, optimistically, pleasantly, rapturously, readily, rhapsodically, smilingly, willingly, with good cheer, with pleasure