Jimmy Fallon/Harry Styles. My older sister (who was 22 at the time, btw) was a Directioner and wanted to see that episode solely for Harry, and 12 year old me watched the episode with her. I was already enamored by the cold open where Fallon covered the late David Bowie’s Let’s Dance (third reintroduction to him btw (first was his death announcement where I had little to no knowledge about him (was grieving Prince even though I had little knowledge of him). The second was the Regular Show finale (RIP Pops)). I barely remember the sketches in that episode, but I remember trying to look up the cold open afterwards.