But if there's one woman who fears no entry in the Sunfly songbook, it just might be Lady Gaga, who took on the 1993 crossover hit with typical full-throated elan at her ArtRave show in Vienna over the weekend, putting an oomph into her rendition that makes even Perry herself sound uncommitted by comparison.
Even the times on the verses where she can't quite reach the high notes, her performance is so emotionally (and physically!) invested that you can't really be anything but awed by it.
