There's only three live shows on The Voice this year, and they were due to air every Saturday from June 8.
But the Britain's Got Talent 2013 final is set to air on the same evening, leaving bosses to move the first show to the Friday, June 7.
It follows declining ratings for the second series of the BBC One show, which had been gaining momentum during the blind auditions.
The show isn't on at all this weekend due to Eurovision, which probably won't help the viewing figures.
Meanwhile, BGT has been enjoying some of its best ratings for years, with last weekend's audition episode being watched by more than 10 million, the best numbers for four years.
An BBC insider claimed: “The decision to move the first live show is in the best interest of viewers to avoid a clash with the BGT final.”
The live shows will continue over the next two Saturdays.
Every one of the acts will sing in the Voice finals this year, rather than having alternating teams perform like last series.
There will be four eliminations every week, one from each team, leaving four acts for the final competing to win.