Lady GaGa has had a trumpet tattooed on her arm.

The 28-year-old singer, who already had more than 10 inkings, including flowers on her hip and a unicorn on her thigh, has now had the musical instrument tattooed on her inner right arm, in honour of jazz musician Tony Bennett.

Gaga posted a photograph of the body art on Instagram on Wednesday (17.06.14), along with caption, ''...let's go it's jazz time world (sic)''

The 'G.U.Y' hitmaker, visited a tattoo studio in New York, and was wearing an Iron Maiden T-shirt and her huge curly wig when she was inked by artist Becca Roach.

Her jazz musician friend Brian Newman, who has worked alongside Tony, also payed tribute to the legend with a duplicate tattoo of his trumpet artwork and Gaga posted a snap of them both.

She wrote: ''Bennedetto. Tony's an artist. he sketched this trumpet and were getting tattoos @brainnewmanny playing on the tony album and arranging music. Tattoos by @badnewsbecca photo by @skwotty (sic).''

Gaga and Tony surprised students at the Frank Sinatra School of the Arts in Queens earlier this week with a masterclass and performance, including 'The Very Thought Of You', previously covered by Billie Holiday and Nat King Cole, and Cole Porter's 'Ev'ry Time We Say Goodbye'.

The 700 students in the audience were also given the opportunity to ask questions during the session.