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 The Most Surprising Celebrity Sex Confessions Katy Perry and John Mayer Break Up . . . Again Personal Trainer to the Stars Harley Pasternak Shares His Secrets 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. Be in the Know With OurCelebrity and Entertainment Newsletter Personalize Young Hollywood TV Movies A-Listers Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR. Louie 5 years Yuck. Louie 5 years Yuck.