lighthearted

adjective2

1. •
   Joyful, glad, taking pleasure in being alive; not depressed or sad.

   • The lighthearted young lovers ran over the hills.
2. •
   Enjoyably lacking of seriousness, not grave.

   • His lighthearted banjo performance was appreciated because it relieved the tension in tight situations.
   • I continued my speech in a more light-hearted vein.