Lady Gaga and Azealia Banks are thought to be in the middle of a Twitter war of words following claims that the ARTPOP star copied one of the rapper's outfits.

Banks criticised Gaga when the singer - due to open the iTunes Festival (September 1) - posted details of her costume for the gig, which she has branded #SwineFest.

Mother Monster tweeted: "I will be providing a list of acceptable attire for #SwineFest throughout the week. Item 1: Seashells. Item 2: Seahorses 3: Starfish.”

Gaga also told fans she would be sporting coloured dreadlocks for an ‘under the sea’ theme, promising that more updates are to follow.

After seeing the Applause hitmaker's tweet, Banks claimed that the theme of Gaga’s upcoming show was very similar to her own Mermaid Ball Tour.

The 212 rapper wrote: "@ladygaga hmmmm sounds alot like Azealia Banks' mermaid balls.

"Of COURSE gaga wants to play mermaid again..... Pffft. Not picking a fight. Just all looks soo familiar.... To me."

Gaga did not shy away from the confrontation and replied with a GIF of Disney’s Little Mermaid, Ariel - thought to be a jibe at Azealia's comments.



Banks - who[uuid=db9cda26-eb9f-48f9-858b-71a9eb80b47e] has had run ins[/uuid] with everyone from Lily Allen to The Stone Roses - apparently worked with Lady G on a song for her ARTPOP LP, with Gaga later confirming that the track had not made the final cut.

Gaga's iTunes Festival set will be streamed worldwide from the Roundhouse in Camden, London on September 1, with ARTPOP set for release November 11.