Almost every time I've heard "AIWFCIY" in the wild, it been a cover version. But my son also loves the original, so I've heard it a couple of times at home.
I think because of these games and the "Covers don't count" rule, I've been hearing more covers of "Last Christmas" and Mariah this year. But that's also lead to hearing some truly awful covers. The worst offenders of both songs were, by an odd coincidence, male artists, but I didn't catch the names either time, so I don't know who's version to avoid in the future. The Mariah one, whoever this guy is, couldn't keep his own rhythm and sounded like he was trying to scat-sing it. The "Last Christmas" one sounded like something you'd hear at a XMas party at a club in The Village, except they wouldn't sing any of the verses, just the refrain, and then they changed the words of the bridge, but it didn't fit the rhythm of the song?!? Even Li'l Z, who was sitting in the car next to me, was like, "This is the worst version I've ever heard.".