Carrie Underwood Photographed After Serious Injury Requiring 40 Stitches

'Below Deck' alum Adrienne Gang tells ET that the singer was 'super sweet' during an encounter a month after her fall.

Carrie Underwood may be keeping a low profile, but she's not shying away from time at the gym!

The 34-year-old singer ran into Below Deck alum Adrienne Gang while working out at an exclusive resort outside of Knoxville, Tennessee, in mid-December, just weeks after sustaining serious injuries during a November fall. 

Gang posted a photo of the two to Twitter on Dec. 12, and though Underwood appears to be wearing a brace on her wrist, there was no sign of injury to her face -- despite the singer receiving 40 to 50 stitches. 

"I didn't notice [her injuries]," Gang tells ET. "She was running on a treadmill like everything was fine. She seemed like she was perfectly fine." 

"She didn't say anything about the accident. She was with a couple other friends, and her husband was there," Gang continued, noting that Underwood was "super sweet." "She was really very gracious." 

Underwood's rep revealed on Nov. 12 that the American Idol alum had sustained multiple injuries after taking a "hard fall on some steps outside her home." The singer had been open with her fans about getting surgery on her wrist, and only recently revealed the injuries to her face in a message to her fan club members. 

"There is also another part of the story that I haven’t been ready to talk about since I have still been living it and there has been much uncertainty as to how things will end up," she wrote. "It’s crazy how a freak random accident can change your life."

"In addition to breaking my wrist, I somehow managed to injure my face as well. I’ll spare you the gruesome details, but when I came out of surgery the night of my fall, the doctor told [my husband] Mike that he had put between 40 and 50 stitches in," she continued, adding that she's healing but "not quite looking the same." 

“I honestly don’t know how things are going to end up but I do know this: I am grateful," she said. "I am grateful that it wasn’t much, much worse. And I am grateful for the people in my life that have been there every step of the way.”

See more in the video below. 

Additional reporting by Brendon Geoffrion.