The other songs have been confirmed as false, I did some more research, but "Devil On My Shoulder" is definitely an Adele song. Maybe it's the lead single from her next album?

I think it's a cut from
21, though. I asked Greg and Adele via Twitter, though. Adele won't respond, though, if anyone does it'll be Greg. Regardless, that's interesting, especially because it's not registered onto her BMI as well. And R's comment about it sounding country would make sense if she's aiming to do some more country music on this album!