happy tune

• cheerfulPleasantly bright in mood
• melodyPleasing sequence of notes
• joyfulFeeling great happiness
• upbeatCheerfully optimistic
• catchyEasy to remember

whistling · humming · lively · bright · bouncy · singalong · carefree · peppy · sunny · ditty · jingle · merry · lighthearted · bubbly · skip · dancing · chirpy · playful