At first glance, Carrie Underwoods tweet might be a bit disconcerting to her hubby Mike Fisher as the country star tweeted early Tuesday morning: “HAPPY BIRTHDAY TO ME!” “My first present = late night date with a tiny semi-bald chubby dude who likes to grunt & cry & pass gas! #bestgiftever” Of course, the brand new 32-year-old mama is referring to her and Mike’s newborn son, Isaiah Michael Fisher! The couple’s firstborn arrived Feb. 27, and on March 3, Carrie introduced her little guy to the world on Twitter, gushing, “God has blessed us with an amazing gift!” A bit awkward, but fortunately will be getting her beauty sleep at night…. Oh, right….