Katamari on the Rock (the famous na-na-na song)
(One note: The chu-chu-chu-churu chorus of girls is more than just a sound, chu is onomaepoteia for "kiss" in Japanese. Lately, ru which is a common ending of verbs has been added to foreign derived words and slang to create "custom verbs." So, churu is a cute way of saying to "kiss." Puts Chu-Chu Rocket in another light doesn't it?)
NAAAAAAAA-NA-NA-NA-NA-NA-NANA-N'NA-NA-NA-NAAAAAA
Don't worry, do your best!
In a picnic-y(*1) mood, feel so good!
What a wonderful afternoon!
Off the limits insolence until midnight Yeah!
Ball it up and roll it around, I love you, always smile for you
Yo