Happy girl
Cheerful, joyful, delighted, content, elated, ecstatic, gleeful, exuberant, jubilant, thrilled, overjoyed, radiant, blissful, bubbly, vivacious, lively, animated, spirited, buoyant, effervescent, ebullient, high-spirited, euphoric, merry, jolly, sunny, beaming, grinning, laughing, smiling, optimistic, positive, enthusiastic, excited, thrilled, enchanted, charmed, elated, exhilarated, uplifted, in high spirits, on cloud nine, in seventh heaven, walking on air, full of joy, brimming with happiness, in a state of bliss.