It always annoys me when people attribute quotes to the wrong sources, usually to celebrities. For instance, this quote was song by Barlow Girl, but it was originally scratched onto the wall of a Cologne Germany concentration camp.
Be happy. There are SO MANY reasons to be happy. Happiness is life's fulfillment. I would rather live a happy one with a smile on my face and a pep in my step! Never let the positivity stop you only live once, so make it a happy and joyful one :)