Samir Hussein/WireImage Lady Gaga is ready to step back into the music scene ... where she performed hits like "Just Dance," "Poker Face" and "Born This Way" to a sold-out crowd of 52,000 ...

(NEXSTAR) — Believe it or not, it’s been 17 years since Lady Gaga first entered our musical lives with her instant-classic pop hit “Just Dance ... back into pop music to “get things ...