Everyone’s favorite reformed (?) psycho-in-a-blond-weave, Britney Spears, made an appearance on “Letterman” last night, reading the Top Ten list which, appropriately enough, was titled “Top Ten Ways The Country Would Be Different If Britney Spears Were President.” Wearing a string bikini — and an enormous tropical flower behind one ear — and looking more toned and in-shape than she has in years, Brit-Brit sat atop a Presidential-looking desk and shifted her weight from hip to hip as she read each number. The appearance was certainly less disastrous than past televised appearances (the infamous MTV Music Video Awards, anyone?), but I couldn’t help but think her “charisma” seemed a little canned. What do you think?