British musician Billy Bragg claims the reason pop star Taylor Swift pulled her entire back catalog from online streaming service Spotify is because of an exclusive deal with Google, Stereogum says.

After discovering two of Swift's songs on YouTube's new online streaming service Music Key, Bragg wrote a lengthy post on Facebook discussing how dismayed he is over what he believes is a "corporate power play."

"What a shame Taylor Swift's principled stand against those who would give her music away for free has turned out to be nothing more than a corporate power play," the musician wrote.

"On pulling her music from Spotify recently, she made a big issue of the fact that the majority of the streaming service's users listen to her tracks for nothing rather than signing up to the service," he added.

He then quoted Swift's interview with Yahoo Music, wherein the "Blank Space" singer said people should pay to listen to music, and said she was doing just the opposite by putting her music on Music Key.

"She should be honest with her fans and say 'sorry, but Sergey Brin [Google's co-founder] gave me a huge amount of money to be the headline name on the marquee for the launch of YouTube Music Key and so I've sold my soul to Google,'" Bragg continued.

Swift's camp, however, denied Bragg's claims in a statement to NME.

"Taylor Swift has had absolutely no discussion or agreement of any kind with Google's new music streaming service," the statement read.

YouTube Music Key's paid service was launched on November 18, acording to Billboard. The beta version of the paid subscription costs $7.99 but will be increased to $9.99 when it gets launched to the public. Its free service option was launched last week.

No artists have announced their partnership with the service as of this writing.

Swift made headlines when she abruplty pulled out her entire catalog from Spotify on November 3.