Photo: WENN.com

Boyband feuds are second only to wars of words between the Gallagher brothers. One it begins, there is no holding back the venom - not to mention the amusing quotes an argument can produce.

The Wanted and One Direction have both enjoyed huge international success in 2012, but have become rivals recently, with a Twitter feud breaking out this week between Zayn Malik of One Direction and Max George of The Wanted. It climaxed with Malik calling George 'chlamydia boy' in full view of his 6.7m followers.

The war of words broke out after Malik called George 'a geek' for posting a photo of himself with US star Usher, prompting George to question Malik, asking "Does that mean i'm 'in'?"

Malik's hostile response was: "I'm not sure why your still talking to me mate conversation ended when I called you a geek. p.s your display just how's how much of a wannabe you are :)"

Zayn Malik suggested Max George had an STD

Insults were traded with other members of each boyband getting involed. Tom Parker of The Wanted poked fun at Zayn Malik's hair - and was quickly shot down by Malik, who tweeted: "Mate if I had a face like yours my hair would be the last thing I'd worry about :)." Louis Tomlinson then told The Wanted's members to 'pipe down' before Malik attempted to end the bickering, saying One Direction were due to start rehearsals.

"Enjoy rehearsals. Stay off the bud... It clearly makes u cranky," replied George, before Zayn hit back, suggesting TheWanted star had a sexually transmitted disease.

"Alright chlamydia boy ;)" he replied, angering his rival further.

"Tell me you're problems without the 8 security in NYC.. The only problem I have with you is the s*** banter. Grow up son," tweeted George.

Clearly, the 'smiley face' at the end of every tweet from Malik did nothing to calm the rising fury of The Wanted.

Below: the best ever feuds in music (no, chlamydia-gate doesn't make the cut)