Courtney Hadwin’s future is so bright, wearing shades won’t protect you.

Channeling the great Janis Joplin, the young British phenom delivered the goods once more when she guested on America's Got Talent: The Champions on Monday night.

“I’ve always been quite shy in I do find it difficult to talk to people,” the teen said in a pre-recorded interview. “When I do sing, I feel like I turn into a different person.” And before our eyes, the AGT season 13 finalist did just that.

Hadwin rocked out with her performance of “Pretty Little Thing,” an original composition. Afterwards, AGT judge Simon Cowell admitted he was stunned by Hadwin’s second-place result last season, after which she signed with Syco Music and Arista Records. “When you were on the show last time and you didn’t win,” Cowell said at the top of Hadwin’s performance, “my mouth literally dropped. So many people were disappointed, hence the reason you’re here today."

When asked how she felt to be competing against the champs, Hadwin was humble. “I didn’t expect to be getting invited to Champions. So just to be here is an honor.”

After a brief delay due to what appeared to be technical issues, Hadwin lit it up. Without a hint of shyness, the young singer even strolled down to the judges’ table for a round of high-fives.

Cowell felt the buzz and remarked on how the contestant’s confidence had grown. “I think this has been my favorite performance of you so far,” he said. Watch it all unfold below.