Skilled female duo�91 has stepped forward to playfully deny against the recent accusations of receiving plastic surgery.

The duo is composed of members of the same age, with both of them being born in 1991, and released their debut song "You Are My Shining Star" in January.

The two recently revealed a picture and seeing their much improved appearances, viewers began suspecting them of undergoing plastic surgery as they commented,�"It seems that 91 suddenly got prettier, they must have gotten plastic surgery~", "Your faces have really become more beautiful. Perhaps the method was..."

91's Hwee Kyung and Ma Ji both tweeted on their own Twitters saying "Did we get plastic surgery? lol no it's a victory due to Photoshop ^^ it's pretty right? Please see us well... thank you~"

91 has proven their skills as they've ranked first on one of the Cyworld Music charts in February, and will be following up with their new track "Stars in the Night Sky".