In a lighthearted manner, cheerfully, with joy.(adverb)
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Use "lightheartedly" in a sentence
"I signed my name lightheartedly and gave him the page."
"I watched intently while my girlfriends chatted blithely, easily, lightheartedly about what seemed to me the most inane and innocuous of subjects: “Patty told Donna she saw Carrie with Jeff at the mall.”"
"You should be representin' for our peeps, man, tweets Gabriele Marcotti - appealing to my patriotic sensibilities as an Italian as he wades lightheartedly into the Rodgers debate."