Within hours of Mayhem ’s release, Twitter was abuzz with theories that, at their most coherent, suggest Swift was secretly featured on Gaga’s track, and, at their least coherent, make some use of the phrase “reheated nachos.

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.” Over the years, the 38 year-old has worn many hats — most recently,