Oh, John. Just because you sometimes look like a pirate, it doesn't mean you have to act like one. Anyway, any pirate worth their salt wouldn't go on the internet saying - Hey, where are all the fake Rolexes at, I want me one 'a those!

The 'Who You Love' singer is suing one Robert Maron - a friend of Charlie Sheen - after he reportedly spent $5 million on what he believed to be authentic timepieces from the dealer, however lawyers for the salesman insist the crooner knew the watches contained "counterfeit" parts.

In a letter obtained by TMZ, Maron's lawyer, Eric George, claims Mayer expressed an interest in buying a fake Rolex Flat Dial on a message board back in 2007.

He is quoted in the (pretty darn damning) letter as saying: "Anyone who wants to sell me one of these watches can get these fake pieces off their hands and make a killing on it. I will even accept a letter from you as a dealer releasing you from any liability in having sold me a counterfeit dial. I will be buying these as counterfeits."

Initial reports claim John - who is a long-time collector of Rolex watches - was "shocked" to find one of the timepieces was a replica after sending it for repairs three years later.

He reportedly returned the watch and was given credit to buy another but now wants a refund for $656,000 he spent on seven other watches which Rolex have told him are counterfeit.

Meanwhile, Sheen just had to get himself involved, tweeting: has also spoken out to defend his friend while critiquing Mayer's "girlie" music.

He then shared a picture of his own watches, which he bought from Robert and described them as being in "perfect health and provenance."

If you, like me know bugger all about watches - Rolex is one of the world's most prestigious watch brands, with the timepieces ranging anywhere from $5,000 with the most exclusive designs costing upwards of $500,000.