Beyoncé closed out the Glastonbury festival yesterday with a bold, crowd-pleasing spectacle that kicked off with her signature hits "Crazy in Love" and "Single Ladies" and maintained that high level of energy for nearly two hours. Midway through her set, the R&B queen played a medley of Prince's lovely ballad "The Beautiful Ones" and a reworked version of the Kings of Leon's rock hit "Sex On Fire." Beyoncé's all-lady band gives the rocker some extra oomph, but the real difference is in the vocal, which takes the Kings' melody and amps up the melodrama to the Nth degree.