Geri Horner "hires a singing instructor to make sure she lives up to the Spice Girls tour"

She is about to return to the stage with her friends Mel B, Emma Bunton and Mel C in June.

And Geri Horner would have hired a singing instructor to ensure that her voices are "up to par" before the long-awaited Spice Girls reunion tour.

According to The Sun, the 46-year-old singer would have taken additional steps to reach the perfect tone because she "does not want to be humiliated" during her many performances.

A source told the publication, "Geri is anxious to make sure she is up to the task when the girls are together. She does not want to be humiliated. She therefore hired a singing instructor.

"The girls are all aware that the exam will be quite intense, but Geri is the only one to have done so much effort.

"She does not want to be the only person to point fingers if it's not perfect," added the insider.

MailOnline has contacted representatives of Geri and Spice Girls for additional comments.

Mel, Geri's partner, 43, said last week that they had already slept together while filming Piers Morgan's Life Stories.

While the episode is expected to air later this year, host Piers, 53, aired Monday an excerpt of the bombshell on Good Morning Britain.

In the clip, we see Piers ask Mel: "You came here to be brutally honest – did you sleep with Geri Halliwell or not? Have you slept with her?

Looking shyly, Mel first tries to dodge the question by saying to Piers: "Yeah. We all slept together in a bed, but not like that, all of us.

But Piers is implacable, searching: "Have you slept with Geri like that?" Mel smiled and nodded as shocked Piers checked, "Yes? Really? & # 39;

"She's going to hate me for that because she's very clbady in her country house with her husband," adds Mel de Geri, married to the Formula One team's head, Christian Horner.

The mother of three also detailed her pbadion night with the success of the Lift Me Up group in Grant, Ed and Ash of 2Day FM.

Mel shared: "In fact, I really did not admit anything … I just admitted that we had a little trick in the day and that's all. It happened one night!

Although it was alleged that the AGT judge's comments caused a split between the Spice Girls prior to their tour, Mel told the radio station that they were in charge. went out very well.

"I was on the phone with Geri. I was not interested in the details, she says, adding that the band continues to organize their concerts.

"I texted him and told him that I'd admitted to Piers that we had a little trick, so do not worry about that, it was all silly.

"I did not go into the details and it was before your husband and before your babies and mine. We had a long conversation. She sent me a text message at night and we talked for a long time.

"I do not understand why everyone does such a thing!"

Mel is thought to have had a difficult relationship with Geri – whose departure from the group in 1998 was due to disputes between the two men.

They would already disagree on outfits for their return on stage. The tour is expected to bring 2.2 million pounds to the band members.

Victoria Beckham is the only member of the group not to join the meeting, which will end at Wembley Stadium in June – 21 years after their performance on the site as part of their Spice World tour.