John Mayer Sings For Seth Meyers After Splitting From Katy Perry

John Mayer performs a song during the first week of Late Night with Seth Meyers on Thursday (February 27) at the NBC Studios in New York City. 

Also making an appearance on the show that night was Girls star Lena Dunham. 

It was reported earlier this week that John and his girlfriend on-and-off Katy Perry have once again separated. This is his first official appearance since the split, but it was nothing more than a musical guest on the show so it probably was not a chance to ask about it.

10 + pictures inside of John Mayer making an appearance...