John Mayer needs fashion lessons from Jennifer Aniston

Yikes! Put 'em away, Johnny! And by "'em", I do of course mean: your shoulders.

Yes, John Mayer may be a legendary guitar player and a mighty fine songwriter and yada yada yada...But he let himself down horribly yesterday.

For here he was - legendary guitar player, mighty fine songwriter and, yes, Gap model - leaving his LA gym in what I would call "not his best look".

I'm sorry, but even 'working out' is no excuse for a sleeveless top. Whatever next, a trucker's hat? A vote for Sarah Palin?

Jennifer Aniston: your country needs you. Or rather: your man needs you. Please get him a new workout shirt, pronto.

Trinny and Susannah show you how to dress for your shape >>

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