Four of the outfits Lady Gaga will wear for her upcoming concert in South Korea were unveiled on Monday.

The four Giorgio Armani-designed costumes will also be shown off at four other venues during her Born This Way Ball world tour that kicks off in Seoul on 27 April, said Shinsegae International, Armani's South Korean business partner.

The new costumes, which are in line with the singer's extravagant and eccentric style, include a leotard fashioned from guitars and a giant piano keyboard headpiece, a black bodysuit made of hundreds of glittering vinyl tubes sewn together with metal studs and glass pieces and another skimpy outfit made of nets and fringes, decorated with scores of crystal pieces and sharp spikes.

"The state-of-the-art outfits were made of materials... that epitomise the futuristic concept of this tour," Shinsegae said, adding the costumes will also be shown at shows in Hong Kong, Singapore, Australia and New Zealand.

Check out the sketches here.

South Korea has banned under-18s from the much-anticipated concert – her second in the country – after it was deemed unsuitable for younger audiences.

Religious groups have protested against Gaga's show, accusing the singer of advocating homosexuality and pornography.

Gaga – real name Stefani Joanne Angelina Germanotta – shot to fame with pop songs including Just Dance, Poker Face and Bad Romance.

She is expected to perform 110 shows this year on the back of the success of last year's Born This Way, which has sold nearly six million copies since its release in May.

The singer has been named one of the Top 100 most influential fashion icons by Time, and has regularly wowed fans with shocking wardrobe choices that include a dress of raw meat.