"Boys of Summer" seems to be the duet of choice this year between two male singers. Kris Allen and Keith Urban have already covered it twice in concert, and now John Mayer and Train lead singer Pat Monahan are joining the party, singing it at their concert last night in New Jersey.
Methinks they need more practice. Pat swallowed a bunch of lines in his verse.
Video from laurenleialoha:
Here's Kris and Keith's awesome version from the first time they sang it together in April, from ocamy24: