Please do not honor John Mayer's poor fashion choices by singing Bobby Vinton's 'Blue Velvet.' Instead, laugh at him for borrowing clothes from your great-grandfather's closet or stealing some fashion tips from Eddie Munster.

What makes it worse is that the serial-dating apologist wore the suit and bow-tie combo to the 2013 Grammys knowing he'd be introducing a performance alongside the legendary Bonnie Raitt.

Despite his poor fashion choice, Mayer's girlfriend Katy Perry and her date Allison Williams still pretended to be really proud of him with their slow clapping.

Thanks for the laughs, John Mayer! And try not to run into Taylor Swift backstage.