Pay no mind party like it's 1999

from Lauryn Hill – Final Hour Lyrics on Rap Genius

Meaning

A phrase that’s been used hundreds of times over. Its a reference to throwing away all of your troubles and just living/partying.

An allusion to Prince’s “1999”:

http://www.dailymotion.com/video/x6ncb9_prince-1999_music

Partying like the world is going to end (the final hour, Judgment Day, etc.)

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