There's probably no God!

Please hold on... that is not my message :)
I saw the following in the news today. Please check.
http://news.bbc.co.uk/2/hi/uk_news/england/london/7681914.stm
The slogan seems to be very interesting.
“There's probably no God. Now stop worrying and enjoy your life”
Two questions which came to my mind.
Q1. What is the word “probably” doing there? Is this whole project based on some assumption?
Q2. Why should you worry to acknowledge a God who loves you?

“For God so loved the world that He gave His one and only Son, that whoever believes in Him shall not perish but have eternal life. For God did not send His Son into the world to condemn the world, but to save the world through Him.”
Jn. 3:16,17

God is love and He loves us. So be cheerful and not worrying in acknowledging Him.