Complex sentence: Then, a giant metal orb was lowered onstage and lifted again to reveal Spears standing behind it, wearing glittery jeans and an orange halter top, while opening the show with a dance-oriented performance of the song.
Split into simpler sentences: Then, a giant metal orb was lowered onstage and lifted again to reveal Spears standing behind it, wearing glittery jeans and an orange halter top. Spears started with a dance-oriented performance of the song.