Taylor Swift 'not allowed' to perform at awards amid music row

American pop singer and songwriter Taylor Swift has told fans that she's not allowed to perform any of her old songs on television.

The 29-year-old appealed to her 85 million followers on Twitter to express their support for her in an ongoing row with two record executives over the ownership of her songs.

She accused the executives - who she identified as Scott Borchetta and Scooter Braun - of exercising "tyrannical control" over her music.

The comments followed news that she was to receive the "Artist of the Decade" prize at the American Music Awards ceremony later this year, where she had planned to perform a medley of her hits.

Swift also claimed that the use of her older music in a Netflix documentary about her life has also been forbidden by the same people.

Braun, who represents Justin Bieber and Ariana Grande among others, this year acquired Big Machine Label Group, the Nashville-based record company founded by Borchetta that owns the master recordings of Swift's past songs.

Swift signed with Big Machine aged 15 and left last November for Universal Music Group.

In a statement released on Friday, Big Machine Records denied Swift's claims that they are blocking the use of her music.

The statement includes the line, "Taylor, the narrative you have created does not exist."