Britney Spears has been accused of lip-syncing for her new album "Britney Jean" after one of her singles "Passenger" was leaked online. Reportedly back-up singer Myah Marie is doing all the heavy vocal lifting.

Even before the release of Britney Spears upcoming album "Britney Jeans", the album has managed to garner its fair share of controversies. As soon as the single "Passenger" from the album leaked online, fans took to twitter, claiming that the vocals were not Spears'.

The speculations soon turned into accusations and Spears was blamed for lip-syncing in the album. A Daily Mail article even reported that it was a backup singer named Myah Marie who was doing all the heavy vocal lifting for the album.

The song, "Sounds like Myah Marie more than Britney (in my opinion)," @kaye_ca tweeted.

And @dylancx2 claimed, "You can clearly tell when they mix in Myah Marie's voice in the second verse and Britney doesn't sing the rest of the song."

Dozens of fans agreed, including @SpikyMooDy, who wrote, "At 1:55 it doesn't sound like Britney at all. It's most likely Myah Marie."

This is not the first time Marie has been reported to have lent her voice to Spears' songs. Earlier this February, Star Magazine reported that Marie had lent her vocals for seven songs in one of Spears' albums. The singer's father confirmed that the backup singer had a "knack for sounding just like my daughter."

"Maybe Britney doesn't know whose voice is on her album and it doesn't even interest her," he suggested. "Maybe she just comes in, lays down the track and leaves, and doesn't care."

However, these new lip-syncing rumors were rubbished by Marie in an email to Radar Online.

"As I told [Britney fan site] in February," Myah Marie wrote in the email, " ... while I am so grateful for the opportunity to provide background vocals for Britney Spears on a small number of her most recent works, I most certainly cannot take credit for her tremendous talent as a singer. She is a veritable 'living legend' with a longstanding reputation for excellence in all aspects of her artistry. She is my idol and I have nothing but the utmost respect and admiration for her. I have no further comment."