• blithe, cheerful, chirpy, convivial, exhilarated, gay, gleeful, hyped, jolly, joyous, light-hearted, merry, mirthful, rollicking, to be in a very good temper, to be in good trim, to be in high spirits, to be of good cheer
• blithely, chirpily, gleefully
• to perk sy up, to uncloud sy's brow