Sir Tom Jones was left red-faced after failing to choose his former support act frontwoman when she auditioned on the UK version of The Voice, due to kick off next Saturday on BBC1.
The Delilah hitmaker is a panellist on the TV talent show, alongside Jessie J, will.i.am and The Script's Danny O'Donoghue.
The judges can't see auditionees as they try out and only come face-to-face with them when they decide they want to be their mentor.
However, Jones was reportedly left devastated after he failed to recognise the voice of Alison Jiear, who supported the superstar with her band The Fabulous Singlettes on several tours, and did not pick her.
A source tells The Sun, "Tom really likes Alison and felt terrible. It just shows how tricky the show is..." Coaches on BBC1's The Voice show the contestants how it is done as they give an all-star performance to launch the series.
Meanwhile, the coaches are set to give it their all as they perform together for the first time for the series debut on Saturday.
Stars of the new BBC show - reported to be earning more than a million pounds between them - had been tight-lipped about whether they would be joined in song on the programme.
But they will be seen performing Black Eyed Peas hit I Gotta Feeling for viewers as the first round of the show's "blind" auditions begin.
In the early stages of the contest the coaches assemble the singers they wish to mentor without actually seeing them - judging them solely on their voices.
A preview of the superstar line-up performing the track will be screened on The One Show, which also features an appearance by Voice host Holly Willoughby.
The Voice judges...