Music that is the antitheses of the depressing themes common in emo music but expressive all the same. Almost show-tuny is some respects, inspired by the happy hits on Fox's 'Glee'. For example, Owl City's Fireflies. "I get a 1000 hugs from 10,000 lightning bugs".
Omg, that Owl City song is like totes gleemo. I love it!!!