The early 2010s was a time period in a league of its own, and not necessarily in a good way. With a decade of hindsight, everything from planking to moustache finger tattoos is tinged with a distinct "what the hell were we doing" vibe. It's amazing how a short period of time can turn something from fashionable to atrocious, and this is especially true of music trends. This has recently been pointed out by Twitter user @lemonade_grrrl , who gave many people unwelcome flashbacks by reminiscing ab…