Singer G.NA revealed her bruised knees from practicing her dance.

Today, G.NA posted on her Twitter, "Picture from when I was filming for 'Oops!' music video. I think my knees are in really bad condition. My poor knees bruised because of the choreography. But I'm still happy because the MV came out well," along with a picture.

In the picture, G.NA is in the studio that was the background for her music video, with her legs put together. She's smiling brightly, but her knees are covered in bruises.

Internet users who saw this commented, "Poor G.NA", "Hope this song goes well too", "She looks so nice" and "Still so pretty."

G.NA released her new album, Beautiful Kisses, on March 14 and is currently working with her title song, "Oops!"

Photo Credit: G.Na Twitter