25 Times Penny And Sheldon's Friendship Was The Best Part Of 'The Big Bang Theory'

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Vote up the best moments in an unlikely friendship.

On The Big Bang Theory, the unlikely friendship between Penny and Sheldon started off as pure comedy, but soon became a highlight of the show. Moments such as singing "Soft Kitty" together and Sheldon coming to Penny for the occassional bit of advice have cemented the duo as BFFs (whether Sheldon likes it or not). Here are 25 Shenny moments that made us smile.