'X Factor' contestant Tamera Foster forgot the lyrics during her performance tonight (16.11.13).
The 17-year-old singer, who had slipped up during rehearsals, missed out some of the words to Shirley Bassey's 'Diamonds Are Forever' on the live show on ITV.
Judge Sharon Osbourne said: "Tamera, it's kind of bittersweet because it was your best performance to date, and then you go in the middle of the song 'errrrrr'. Nobody would have known if you hadn't have done that.
"But because you're just a baby, you don't know these little things that help an artist along the way.
"You always just carry on, you never go 'errrrr' but it was the best performance you've done to date."
Tamera's mentor Nicole Scherzinger said she was proud of her and Gary Barlow said he was going to ignore the mistake and could still see " a lot of potential" in the singer.
He said: "I'm just waiting for you one of these weeks to completely steal the show, the magic moment, it's not happened yet, it's not this week but I know it's in there. I'm praying we get to see it."
Fellow judge Louis Walsh said: "I think you may have lost the words somewhere in the middle but it's a sign of a true professional, you picked yourself up and you kept going and that's what this business is all about".
Tamera told host Dermot O'Leary: "It was a tough song but I'm proud of myself because I was very scared about coming on and performing this song.
"I did mess up and I realise that but I powered through and I picked myself up and I carried on."