Recently, it was rumoured that the 32-year-old singer was planning to lip-sync her way through her two-year Las Vegas gig, reported Huffington Post.
"I'm definitely going to be singing live. I always sing live. It doesn't sound so great all the time, but I do my best," Spears said.
The singer had confirmed earlier that she will be heading to Las Vegas to kick off a residency at the city's Planet Hollywood Resort and Casino with an expected 50 shows every year for two years.