It’s a happy birthday to rack-tastic Kristin Chenoweth, who turns an improbable 40 today, all 4’11” of her. Small in stature but big in voice and sunny charisma, Chenoweth is a Tony Award winner, and one of the better things in the recent Space Chimps, with her voiceover role as Kilowatt, a big-headed alien who shrieks and whose head lights up when she’s afraid. Which is kind of how I like to imagine her reacting to ex-boyfriend Aaron Sorkin getting pinched with mushrooms.