I remember reading an article in college that said the Beatles' "Yesterday" was the most covered song of all time. Who knows if that is true (then or now). But even if it is, it certainly doesn't mean that it's the most common cover song experienced by any one individual. I've never heard a band cover that song in concert. The only time I've heard anyone sing it was the middle-aged Asian street busker who played acoustic songs at the South Kensington tube stop when I lived in London (he knew neither the correct music or lyrics to the song, which somehow made it more endearing when I'd hear it nearly every day on the way home from school).
In thinking through the most common cover songs in my musical experience (and I'm setting aside cover bands), the most common cover I've heard live has to be the Stooges' "I Wanna Be Your Dog." I mean two bands on the second Weezer Cruise alone covered it, for goodness sake (The Orwells and Cat Power). I've seen people from Joan Jett to Jack White cover it. No other song is even close in my personal experience. How about you?
At the halfway point of 2014, five albums are the clear standouts to me (and if you had told me at the begining of the year that Jack White was releasing a new album and it wouldn't make this list, I would you told you you were crazy):
Sharon Jones and the Dap-Kings - Give the People What They Want (Um, what the people want is a cancer-free Sharon Jones brining her joyous music to the masses, and now we have that.)
Sleeper Agent - About Last Night (I fell in love with these guys on the first Weezer Cruise. This is a very fun album and an improvement on their fabulous debut Celebrasion.)
The Orwells - Disgraceland (Not nearly as good as their insane live performances, but still really good, punk inspired lo-fi garage music.)
Fanfarlo - Let's Go Extinct (Reservoir will probably always be my favorite Fanfarlo album, but this is a huge bounce back from their sophomore effort.)
St. Vincent - St. Vincent (By far her best work, which says a lot because she's been awesome for a while. And who doesn't love the choreographed performance art live performances that she's rocking in support of the album?)