POPSUGAR Celebrity John Mayer Slide Picture of John Mayer Performing in Chicago Best Face Forward by Celebrity 8/16/10 0 Shares Like us on Facebook Sign up for our daily newsletter > John Mayer was lost in song on Saturday during a performance in Chicago. Image Source: WENN.com Read More HotJohn Mayer John Mayer Katy Perry and John Mayer Break Up . . . Again Personal Trainer to the Stars Harley Pasternak Shares His Secrets The Most Surprising Celebrity Sex Confessions John Mayer Dreams Up Justin's Cookie Dough Almond Butter POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Get the scoop with our daily newsletter Movies Young Hollywood TV A-Listers Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR. Louie 4 years Yuck. Louie 4 years Yuck.