Premise: John Mayer . After his appearance at the 2001 South by Southwest Festival , he was signed to Aware Records , and then Columbia Records , which released his first EP , Inside Wants Out . In 2003 , he won the Grammy Award for Best Male Pop Vocal Performance for the single `` Your Body Is a Wonderland '' . `` Who Says '' is the thirteenth single released by American singer-songwriter John Mayer , and the first to be released from his fourth studio album , Battle Studies .
Hypothesis: John Mayer is a singer.
Label: ENTAILMENT