The “Single Ladies” singer promised in a press conference leading up to her performance at the (AKA “The Beyonce Bootylicious Mini-Concert, Brought to You by Some Football Game”) that she was “well-rehearsed” and would “absolutely” be singing live. Not only did she live up to her promises, but she did so while executing the kind of beastly/eye-popping choreography few of her contemporaries would attempt without the promise of an oxygen mask descending from the ceiling. Granted, there may not have been a ton of actual vocalizing, but the show-closing “Halo” was powerful and totally in tune, and the mid-set emegence of Destiny’s Child cohorts Michelle Williams and Kelly Rowland was a squee-worthy (if expected) delight.