Who Vetted Daddy Yankee?

Say this: Daddy Yankee has cred.

The Reggaeton superstar who endorsed Sen. John McCain yesterday, was accused in 2007 of assaulting a soccer player at his hotel... and took a bullet in his leg during an altercation.

His lyrics are also quite NSFW and colorful.

Was he vetted by McCain's campaign?

A McCain spokesman would only say: "Don't mess with Daddy Yankee."